Vacuum Receivers with Hinged Lid VRH and VRH-MM Series Models:

Vacuum Receivers with Hinged Lid VRH and VRH-MM Series Models:
Vacuum Receivers with Hinged Lid
VRH and VRH-MM Series
VRH-12, VRH-19, VRH-38, VRH-76
VRH-12-MM, VRH-19-MM, VRH-38-MM
VRH Series
© 2013 NOVATEC, Inc. All Rights Reserved
Document: VRH IM 5-7-2013
Instruction Manual VRH IM 5-7-2013
Please record the following
information, which is specific to this
piece of equipment, in the space
provided. Our Parts/Service
Department will need these numbers
to properly respond to any of your
Instruction Manual: VRH IM 5-7-2013
Model #:__________________________
Serial #___________________________
DISCLAIMER: NOVATEC, Inc. shall not be liable for
errors contained in this Instruction Manual nor for
misinterpretation of information contained herein.
NOVATEC shall not, in any event, be held liable for any
special, indirect or consequential damages in connection
with performance or use of this information.
This manual is dedicated to the principle that any engineered system will have many elements
contributing to the smooth operation of the system, and that these must be understood in order that
installation and operation can proceed successfully.
The electrical and mechanical components in the GSL Series loaders have been manufactured,
selected and assembled with care to give you excellent service. All components of your GSL loader
have been carefully engineered and manufactured and have been thoroughly inspected for quality,
function and performance.
Before installing this system, please read this manual, review the diagrams and the safety
information. This should save valuable installation and operation time later and will help ensure safe
operation and long life.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
Table of Contents
1-UNPACKING AND INSPECTION ....................................................................................... 4
2-BASIC FUNCTIONS OF VACUUM RECEIVERS ............................................................... 4
2.1 Novatec VRH Series Receivers .................................................................................... 4
2.1.1 Novatec VRH Standard Features ........................................................................... 4
3 SPECIFICATIONS ............................................................................................................ 5
4 PRINCIPLE OF OPERATION – VACUUM SYSTEMS ........................................................ 6
5 PRINCIPLE OF OPERATION-VACUUM RECEIVERS ....................................................... 6
6 RECEIVER INSTALLATION ............................................................................................... 8
6.2 Machine Mount ............................................................................................................. 8
6.3 Adjusting Lid Orientation ............................................................................................... 8
6.4 Connecting the Receiver to the System ........................................................................ 9
7 DEMAND LEVEL SWITCH WIRING ................................................................................. 10
8 INITIAL START UP ........................................................................................................... 12
9 USE OF PROPORTIONING VALVES............................................................................... 12
10 MAINTENANCE .............................................................................................................. 13
10.1 Flat Screen Filter Cleaning ....................................................................................... 13
11 TROUBLESHOOTING .................................................................................................... 15
11.1 Problem: Poor Or No Conveying .............................................................................. 15
12 WARRANTY .................................................................................................................... 18
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
After receipt of the unit, completely inspect it for damage. Although the units are packaged securely,
vibration and mishandling during transit can cause damage.
Since receivers are part of a system and do not operate alone, examine carton carefully for
accessories, wiring and spare parts that may have been included in the shipment. Check inside
chambers for parts and shipping materials.
NOVATEC VRH Series vacuum receivers are vessels for the receipt of materials conveyed by a
vacuum loading system consisting of a central vacuum pump, a control system and interconnected
vacuum tubing.
Each unit is designed to operate within a specifically pre-engineered central vacuum system and
must be matched to the line size of the system (tubing diameter), control voltage and throughput
capability. Each receiver must be accompanied by a range of accessories for its operation. These
components are purchased separately.
-control system
-tubing, bends, couplers and flex hose of the correct diameter for the vacuum system
-tubing, bends, couplers and flex hose of the correct diameter for material conveying
The standard VRH receiver has an integral External Fill Valve (EFV) which eliminates the need for a
separate Station “T” valve but an option allows the EFV to be replaced by a tubing stub that
connects to a Station “T” if that is the desired method of operation.
If a VRH-38 or VRH-76 is ordered with 4” O.D inlet and outlet, these units can only be operated with
a remote Station “T” valve.
2.1 Novatec VRH Series Receivers
NOVATEC VRH Series receivers are designed to receive virgin pellets and regrind materials
vacuum conveyed to them from storage containers and are typically located over drying hoppers,
blenders and process machines. VRH series receivers are usually equipped with screen disc filters
that permit the passage of dust and fines, but hold the virgin/regrind in the receiver chamber.
Machine Mount versions are available for the VRH series to load material directly into the machine
2.1.1 Novatec VRH Standard Features
 Hinged lid with external fill valve
 Inlet & outlet stub diameters from 1.5” through 4” (depending on model)
 Dump valve with integrated magnetic reed demand level switch
 24 VDC control voltage or 115 VAC as a No Charge option
 12’ drop cable
Machine Mount models include a JIT 2 lb. glass hopper with height-adjustable photo
eye demand switch.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
NOVATEC central vacuum conveying systems utilize a powerful vacuum pump to create vacuum
conveying power for a number of receivers. Receivers are interconnected with the vacuum pump
via tubing and a control system. Each receiver in the system has the ability to use the central pump
for vacuum conveying power within a sequencing receiver at a time. The
selected conveying control system in use determines the sequence of operation. The EFV valve
mounted on top of the VRH receivers or the vacuum breaker or station “T” valves, located near each
receiver are activated, one at a time, to allow vacuum to be pulled through each receiver with a
demand for a set period of time. The vacuum pulls plastic pellets of regrind into the receiver and
after that receiver loads, the vacuum signal is passed onto another receiver with vacuum demand,
allowing it to load.
Vacuum systems typically employ a cyclonic type central dust collector, located near the vacuum
pump. The dust collector allows material fines and dust that are carried through from each receiver
to be trapped, before they are allowed to enter the pump. VRH receivers are equipped with
reinforced screen filters, freely allowing dust and fines to pass through and be trapped by the central
dust collector. In this regard, users find efficiency in two ways:
1. The conveyed materials are somewhat ‘stripped’ of dust and fines by the vacuum system. These
fines typically provide little value and/or actually detract from the molding process.
2. The maintenance required for the filter medium is greatly reduced and is more conveniently
located at floor level, near the pump.
Vacuum Header
EFV Valve
with Flapper
with Sight
Dust Collector
Vacuum Pump
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Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
Each receiver is equipped with a material level switch that signals the control system with a
‘demand’ for vacuum power from the central pump to load. The switch may
be a tilt switch, located on the flapper valve below each receiver or in the
form of an electric eye that can sense the presence or absence of material in
a sight glass below the receiver. The switch is designed to signal a lack of
material and the need, or demand, for the material supply to be replenished.
Inlet check valve
inside receiver
The control system will receive the demand signal from the receiver and when it is able, send a
signal to that receiver station, allowing it to load. The receiver station is equipped with a vacuum
breaker that will open, allowing vacuum power to enter only that receiver, creating suction to pull its
discharge flapper valve shut and pull material to the receiver from the selected material source. As
material is pulled into the receiver vessel, it passes through a check valve on the receiver inlet and
the receiver’s chamber fills. The vacuum air used for this process is drawn through the filter media
of the receiver back towards the central pump for the time setting established on the central control
for that receiver. The filter media blocks the loaded material from entering the vacuum line that exits
the receiver.
Once the load time setting expires, the central control turns off its signal to that receiver, allowing the
vacuum breaker valve to close, shutting off the vacuum supply to that receiver. While the control
system directs the vacuum signal to move on to other receivers in the system, the loaded receiver,
no longer under the negative pressure of vacuum, gravity unloads its material into the vessel or
machine below it. At this point, receivers equipped with the optional blowback feature, are triggered
to send a blast of compressed air down through the screen filter, cleaning off collected dust and
fines. The check valve installed on the material inlet of the VRH, now closed, blocks the flow of the
blowback air from entering the material conveying line.
Material discharges from the chamber by gravity and flows to its
destination (dryer, blender, machine). If the loaded material completely
evacuates the chamber and does not back up into the receiver, the
process will repeat. This is the result of the discharge flapper on the
base of the receiver, which is pushed open by the discharged material,
swinging back by gravity towards closing after material is unloaded. The
flapper’s demand switch will indicate a new demand to the central
control. If material does back up into the receiver, it will not allow the
discharge flapper to swing shut. This will stop the demand switch on the
flapper from sending another demand signal to the control. Once
material recedes away from the flapper, the flapper will swing by gravity
towards closing and once again create a demand signal.
© 2013 NOVATEC, Inc. All Rights Reserved
Counter-weighted flapper
discharge valve with tilt
demand switch.
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
Machine mounted units do not require a flapper valve or demand tilt
switch, but instead utilize a clear sight tube, which mounts vacuum-tight to
the machine throat, with a sensor to control loader operation based upon
the level of material within the sight tube. In many cases, a redundant,
vacuum-sealing flapper is added to the sight glass, to assure a vacuum
tight seal for loading. The sensor used on machine mount sight glasses
may be a capacitance type, with a sensitivity adjustment, set against the
glass, or a pair of photoelectric sensing elements called an emitter and a
receiver that send a signal through the glass. In either case, the function
is similar to the flapper tilt switch in the way it signals the central control
system when material is not present and that the receiver requires loading.
Note that a sensor on the sight glass may be vertically adjustable for
different levels of material in the sight glass, IE: The user can adjust at
what level the receiver will call for more material.
VRH-MM Machine Mount with
photo-eye demand switch.
6.1 Hopper Mount
Mount the receiver body to the hopper lid, positioning it so that the material inlet is directed towards
the material pick up point or conveying line. Make sure the dump valve flapper has enough room to
move freely. Secure the receiver to the hopper lid with captive bolts or clamps to ensure a safe
installation with no chance of hardware vibrating loose. Ensure a tight seal when securing the loader
to the hopper or machine. Use flexible material hose to connect to a pick-up wand or directly to the
material conveying line. Conveying lines should be installed horizontal and/or vertical, using a 90
degree radius bend for directional changes, and it should be as direct as possible with no slope. All
connections must be vacuum-tight. Rigid conveying tubing should be properly supported by the
installer to provide a safe and secure installation.
6.2 Machine Mount
On machine mounted units, the bottom flange is usually supplied undrilled to allow a range of
mounting patterns and hardware choices. A gasket is used to provide a tight seal between the
receiver base and the machine throat. Use flexible material handling hose to connect the material
pick-up lance or to a vacuum take-off box.
In either case, the flexible hose should be only as long as needed, since excess hose will reduce
loading efficiency and is prone to rapid wear.
6.3 Adjusting Lid Orientation
The lid orientation can be easily adjusted by
loosening the nut and button bolt on the black
band clamp.
You will need a 7/16” socket and a 5/32” Allen
Then, simply rotate the lid to a convenient
position. Push the band clamp up and re-tighten
the nut and button bolt.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
6.4 Connecting the Receiver to the System
Each receiver in the vacuum loading system requires a vacuum breaker valve to be connected to it,
which in turn is connected to the central vacuum header coming from the vacuum pump/dust
collector. The header typically interconnects several receivers with the vacuum pump. The vacuum
breaker valve is the key device for directing vacuum power to the receiver for operation.
VRH series receivers, the vacuum breaker valve is the only electrical/pneumatic device associated
with the receiver, unless other options are employed. The valve requires a connection to clean and
dry compressed air, between 80 and 125 psi. The valve also requires electrical connection to the
control system being used. See the central control instructions to assure that the solenoid on the
vacuum breaker valve is the proper voltage and for connecting the valve solenoid coil to the control
The VRH with integral external fill valve (EFV)
greatly simplifies installation.
Pneumatic Solenoid:
• Connect to control
• Connect to compressed air
Connect stub on
EFV to vacuum line
using flex hose – as
short as possible.
If stubs are used instead of the EFV, an external Station “T” valve must be installed in the vacuum
line and the VRH receiver is then connected to the Station “T”.
Connect the vacuum breaker valve to the
lid of the receiver as described in the
vacuum breaker valve instructions.
Depending upon the installation, the valve
to receiver connection can be a
combination of tubing and flex hose as
required, but should be kept as short as
possible. The final connection to the lid of
the receiver should be provided with flex
hose to allow easy removal of the
receiver lid for cleaning and maintenance.
Pneumatic Solenoid:
• Connect to control
• Connect to
compressed air
Vacuum Header
Vacuum Header
“T” Valve
To lid of
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
Each receiver is equipped with a demand level switch that must be connected to the central control
system. The switch may be in the form of a tilt switch on the discharge flapper valve, a capacitance
sensor or rotating level switch, located in a bin below the receiver, a photoelectric switch on the sight
glass of a machine throat receiver, or some other form. In all cases, this demand switch is required
to tell the central control system when this receiver is in need of material. Since the receiver may be
moved occasionally for cleaning or equipment changes, NOVATEC provides most demand switches
with twist-lock connectors, allowing the receiver to be removed while the wiring to the control to can
remain intact. This robust connector provides a reliable connection point for wiring to the control.
The following illustrations show 24 VDC wiring details for common NOVATEC demand devices. Use
these illustrations in conjunction with the wiring instructions for your central controls to carefully
connect the demand switches to your control system.
Green LED is ON when
power is connected.
Amber LED is ON when
switch is conducting.
Green LED is ON when
power is connected.
Brown (V+)
Blue (V-)
Black (NO)
White (NC)
Brown (V+)
Blue (V-)
DC application only.
Insulate to prevent
short circuit
S=Silver Screw
G=Green Screw
C= Copper Screw
Rear View of Male Plug
Rear View of Male Plug
Plug Set
V+ (24 VDC)
Plug Set
Plug Set
V+ (24 VDC)
Rear View of Female Plug
V- ( 0 VDC)
Level Switch Demand (24 VDC)
Typical Photo-eye
Demand Switch
S=Silver Screw
G=Green Screw
C= Copper Screw
S=Silver Screw
G=Green Screw
C= Copper Screw
Rear View of Male Plug
Rear View of Female Plug
S=Silver Screw
G=Green Screw
C= Copper Screw
Gray (x2)
White (demand)
Blue (0 volts)
Brown (V+)
Indicator Light:
ON for demand
(no material in
front of sensor)
S=Silver Screw
G=Green Screw
C= Copper Screw
Demand Flapper mounted Tilt Switch
Level Switch
Clockwise = NC
CounterClockwise = NO
0 Volts
Rear View of
Female Plug
S=Silver Screw
G=Green Screw
C= Copper Screw
Level Switch Demand
Demand Input
Typical Capacitance
Demand Switch
+24 VDC
Typical Discharge Flapper
Tilt Demand Switch
CAUTION: Follow All Plant Wiring Formats
and Local or National Electrical Codes.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
For optimum receiver operation, adjust the vacuum-on load time on the central control so that the
vacuum receiver is almost completely full at the end of the load cycle. Do not allow the chamber
to overfill.
Adjust the dump time so that it is only 1 to 2 seconds longer than the time necessary to completely
empty the receiver.
Proportioning valves are a convenient method for introducing regrind into the process while vacuum
loading of virgin material. The proportioning valve is typically installed onto the material inlet of the
receiver and is connected to the central control system, or an accessory control specifically designed
for proportioning valve operation.
Note that a proportioning valve should never be relied upon for accurate mixing of two materials, but
are only a process convenience for loading a second material (typically regrind). An ideal use of a
proportioning valve is emptying a granulator of reground material, in quantities known to not exceed
the limitations or specifications of the process. If requirements for the proportioning valve require
more accuracy, consult with NOVATEC regarding the use of a blender in lieu of a simple
proportioning valve.
External Proportioning Valve
Solenoid: Connection to
control and connection to
compressed air supply.
Material #1 inlet,
typically Virgin
Material #2 inlet,
typically Regrind
Material Outlet, connected
to receiver Inlet
Proportioning valves and their associated controls split the central control’s vacuum-on time
for a particular receiver into two parts: one for loading virgin and one for loading regrind.
Making initial settings for the proportioning valve will require:
1. Determining and setting the approximate percentage of vacuum on time to be
dedicated to regrind loading, based upon the specs of the product being produced.
2. Depending upon the control being used, determining and setting the approximate
percentage of vacuum on time to be dedicated to virgin loading.
3. The number of valve switches (virgin/regrind/virgin/regrind, etc.) the valve will perform
while vacuum loading, to encourage “mixing” of the two materials.
4. Increasing the vacuum-on time to compensate for use of the proportioning valve
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
Be aware that use of a proportioning valve will ask the vacuum system to alternately vacuum convey
two materials, and each time a material is to be loaded, it takes time to stimulate the material into
motion by vacuum. This process adds valuable time to the conveying process and can create
conveying problems if too many ‘mixing’ cycles are set on the control.
Also, the density and flow characteristics of virgin and regrind materials are typically very different,
as well as the conveying distances. These factors must be taken into consideration as the
percentage and number of valve cycles are set on the proportioning controls. A 50% setting of
vacuum time dedicated to regrind will never equate to a 50% quantity of regrind material ending up
in the receiver. It is best to make trial and error tests of proportional loads to see what results are
created rather that assuming a specific outcome based purely on control settings.
It is common that vacuum “ON” time for any receiver equipped with a proportional valve must be
increased to allow for the dual loading capabilities of the proportioning valve.
10.1 Flat Screen Filter Cleaning
The VRH hinged lid with lock-in place safety, makes filter cleaning
VRH Series receivers are typically used for conveying virgin pellets
and/or regrind. The amount of regrind or small, irregularly sized
particles within the conveyed materials that might be trapped in the
screen, along with conveying velocity and throughput will all
determine the frequency of necessary screen filter cleaning.
Typically a standard screen filter will only need to be manually
cleaned when changing materials. Or in the event of infrequent
(or no) material changes, once a week.
CAUTION: Be sure to turn off the receiver at the central control and/or disconnect electrical power
and compressed air supplies before any type of maintenance. Receivers may be automatically
energized to operate with no warning, startling the maintenance worker.
The screen filter can be accessed by turning the spring-loaded
butterfly clamps (around the lip of the lid) counter-clockwise.
Lift the lid until it locks in place.
 Now the screen may now be removed for inspection and cleaning.
Vacuum cleaning the bottom of the screen is recommended to remove collected
resin debris, dust and fines. If compressed air is used, be sure to wear goggles
and blow from the top (course, expanded metal side) of the filter down through the finer screen
media. Never bang the filter against a hard surface to dis-lodge debris. Distortion of the filter screen
or sealing ring can result.
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Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
Once clean, thoroughly inspect the filter for severe wear, holes, tears and material abrasion. Any
break in the filter screen indicates the need for new filter. Do not attempt to repair the screen.
Remember that the screen assures that loaded material makes its way into the process and not to
the vacuum line, central dust collector or pump. In addition, examine the sealing ring around the
screen filter. This ring provides the vacuum seal between the lid, the filter and the receiver body.
The ring must be smooth, clean and intact to provide a suitable seal for vacuum sealing. Replace
the filter if the seal is not in perfect shape.
Once cleaning/inspection is complete, the filter may be reinstalled by
placing it on the flat rim of the loader body (fine screen DOWN and
course screen UP) and lowering the receiver lid down on the body so
the screen filter is centered between the two.
Re-tighten the butterfly clamps by turning clockwise.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
11.1 Problem: Poor Or No Conveying
1. Vacuum T Valve Operation
Each vacuum receiver in the conveying system is coupled to a vacuum “T” valve that
isolates the vacuum conveying power of the pump to one receiver at a time for conveying.
Each T valve in the system must close off air flow when it is NOT in operation, allowing
other receivers to receive full vacuum. One ‘stuck’ valve can ruin the vacuum supply for the
entire system. Check that each valve operates in response to its receiver’s turn in the
vacuum system. Each valve should open for loading and close when loading is complete.
The extended shaft of the valve’s cylinder is a good indication of valve operation.
Rule of thumb: If only one receiver in the system is conveying correctly, it is probably that
receiver’s T valve that is not closing properly.
2. Receiver Discharge Flapper Stuck Open
The flapper valve at the base of the receiver provides three critical functions:
 Seal off the base of the receiver, creating a sealed vacuum chamber and allowing it
to load,
 Open reliably to allow material to empty out and
 Signal the conveying control system of the need for more material (when it swings
shut, by its own weight).
If the flapper valve is stuck open or does not fully close, conveying cannot take place. A
problem receiver can be easily checked for proper, free movement of its flapper valve:
 If conveying is not triggered when the flapped is closed, there is an issue with the
electrical demand switch.
 If the flapper does not swing nearly shut by its own weight, there is a pivot point
(hinge) or counterweight issue.
 If the flapper is ‘stuck’ in the open position, there is a material contamination issue
with the pivot point (hinge) of the valve and it must be cleaned and examined for
wear. Contamination of the hinge is typically caused by material, finding its way into
the pivot point, but in older receivers, may also be a metal burr that has formed from
3. Inlet Check Valve Stuck Open
Many receivers are equipped with swinging check valves on their material inlets. Check
valves provide a variety of useful functions for system operation and are pushed open when
material is conveyed into the receiver. But on systems that convey material from one source
to multiple receivers, each check valve in the system must seal to allow the one receiver
being loaded to receive the full vacuum force from the conveying pump. A check valve that
is stuck open, either by hinge wear or a trapped pellet, will leak valuable vacuum air,
decreasing vacuum capability at other receivers or even preventing conveying throughout
the system.
Rule of thumb: On systems that convey material from one source to multiple receivers via a
common material line; If only one receiver in the system conveys correctly, it is probably that
receiver’s check valve that is not closing properly.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
4. Conveying Controls Not Properly (Re) Programmed
Central material conveying systems that include a network of pumps, receivers and material
sources provide high efficiency and a multitude of flexibility. But often, new requirements
are not completely programmed after material or system configuration changes. Items to
 Is the new material source further away than the previous source? More conveying
time and/or purge time might be required to accommodate this difference in distance.
 Is the new material as free-flowing as the last material? Does the material have a
tendency to clog the conveying lines, or simply convey slower due to weight or
shape? Changes to load/purge times as well as material pick-up tube changes may
be required.
 Has the receiver been assigned to the proper vacuum pump? The proper material
 Has system piping and or wiring been modified to accommodate this new
configuration for conveying?
5. Confirm Proper Vacuum Breaker Valve Operation
Located on the central vacuum pump of the system, the vacuum breaker valve allows
ambient air to be drawn into the pump when the conveying system is NOT conveying. This
function prevents rapid re-starts and stops of the pump during the “seek” time of the loading
control, cools the pump and prevents the over loads in the pump starter from over heating.
But the pneumatically-operated breaker valve must close and seal when the vacuum system
is conveying material, directing all vacuum force to the job of conveying. Check the
 The valve is connected to a reliable source of clean compressed air, which is turned
on. Air pressure should be 85-120 psi.
 The valve must not be leaking vacuum air. Often a sucking sound can be heard,
indicating the valve is not sealing properly.
 View the level of vacuum created by the pump on its vacuum gage while attempting
to convey material: Although the reading on this gauge will vary greatly depending
upon your system configuration, it is a valuable tool for assessing system operation
and discovering faults. Vacuum levels below 6” indicate a breaker valve fault or other
problems in the vacuum system.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
6. Check The Source Of Your Material
Easily overlooked, the source of your material may be either empty or the wrong tubing or
valve connections have been made.
Common bulk box issues are:
 Rat-holing: The feed tube has sucked up all the free-flowing material around its pickup end and the material must now be stirred to allow material to flow into the feed
tube again. A Gaylord tilter may be helpful in this situation.
 Bag liner line plugging: The feed tube has sucked in the thin film lining of the gaylord,
blocking off material flow to the receiver.
 Feed tube fell out of the box: By weight of its own hose, or by vibration of the flex
hose while conveying.
 Out of material: Time to move in a new bulk box.
Common material selection issues:
 Conveying line connected to the wrong source of material:
 Wrong purge valve selected: If a purge valve is used at the material source, it must
be programmed by the system control to operate in conjunction with a specific
receiver. Material changes require making a new valve selection at the system
 Purge valve is not operating: If a purge valve is used at the material source, it must
be energized to allow material loading (and de-energized for purging). A fault at this
valve, IE: lost compressed air connection, an open purge valve access door or a
material jammed purge valve will prevent material movement.
7. Feed Tube / Take-Away Box Air Settings
The conveying of material by air cannot be accomplished without air movement.
Regardless of the type of pickup device being used; purge valve, wand, take-off box, etc.…
these devices must be adjusted to allow the introduction of material and air, in a mixture
suitable for conveying the specific material the distance required.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
Instruction Manual VRH IM 5-7-2013
WARRANTY – NOVATEC, INC. - Effective Date 4-4-2013
The provisions in equipment specifications are descriptive, unless
expressly stated as warranties. The liability of Novatec to the
purchaser, except as to title, arising out of the supplying of the said
equipment, or its use, whether based upon warranty, contract or
negligence, shall not in any case exceed the cost of correcting defects
in the equipment as herein provided. All such liability shall terminate
upon the expiration of said warranty periods. Novatec shall not in
any event be held liable for any special, indirect or consequential
damages. Commodities not manufactured by Novatec are warranted
and guaranteed to Novatec by the original manufacturer and then only
to the extent that Novatec is able to enforce such warranty or
guaranty. Novatec, Inc. has not authorized anyone to make any
warranty or representation other than the warranty contained here.
Non-payment of invoice beyond 90 days will invalidate the warranty. A
renewed warranty can be purchased directly from Novatec.
all of our plastics auxiliary equipment. We warrant each NOVATEC
manufactured product to be free from defects in materials and
workmanship, under normal use and service for the periods listed under
“Warranty Periods”. The obligation of Novatec, under this warranty,
is limited to repairing or furnishing, without charge, a similar part to
replace any part which fails under normal use due to a material o r
workmanship defect, within its respective warranty period. It is the
purchaser’s responsibility to provide Novatec with immediate
written notice of any such suspected defect. W arranted
replacement parts are billed and shipped freight pre-paid. The
purchaser must return the suspect defective part, freight prepaid and
with identifying documentation to receive full credit for the part returned.
Novatec shall not be held liable for damages or delay caused by
defects. No allowance will be made for repairs or alterations without
the written consent or approval of Novatec.
Please note that we always strive to satisfy our customers in whatever manner is deemed most expedient to overcome any issues in
connection with our equipment.
Warranty Period:
Note: All warranty periods commence with the shipment of the equipment to the customer.
VRH Series Receivers
Routine maintenance/replacement parts are excluded from the warranty. These include, but are not limited to: hoses, desiccant, filters, filter
elements, wiper seals, gaskets, dew point sensors, infrared lamps, motors, internal solenoids, fuses and motor brushes. Use with abrasive
materials will void the warranty of any standard product. Wear resistant options may be available to extend usable service life with abrasive
materials. Novatec reserves the right to limit the warranty if the customer installs replacement parts that do not meet the specifications of
the original parts supplied by Novatec.
This warranty shall not apply to equipment:
1. Repaired or altered without written approval of NOVATEC unless such repair or
alteration was, in our judgment, not responsible for the failure
2. Which has been subject to misuse, negligence, accident or incorrect wiring by others
Warranty is void if processing rates exceed manufacturer-recommended levels or if damage is caused by
ineffective power isolation and/or power spikes/sags or incorrect installation.
NOTE: All conditions and content of this warranty are subject to changes without notice.
© 2013 NOVATEC, Inc. All Rights Reserved
Document: IM VRH 5-7-2013
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