Cash Valve PBE-2 Cryogenic Combination Pressure Builder/Economizer Owner's manual

Cash Valve PBE-2 Cryogenic Combination Pressure Builder/Economizer Owner's manual
CASH VALVE TYPE PBE-2 COMBINATION PRESSURE BUILDER/ECONOMIZER REGULATOR
INSTALLATION, MAINTENANCE AND REPAIR PARTS INFORMATION
Before installation, these instructions must be read carefully and understood.
DESCRIPTION
The Type PBE-2 regulator is designed for
cryogenic service and combines the pressure
building and economizer functions into one
unit. It is a direct acting, single seated, spring
loaded diaphragm-type regulator. In the
Type PBE-2 , the economizer phase starts at
the point at which the pressure build level is
reached, thus assuring a smooth transition
between the two functions.
SPECIFICATION DATA
Service: Cryogenic Liquids and Gases
Size: ½" only
Connections: Threaded female inlet and outlet
Temperature rating:
-320°F (-196°C) to +150°F (66°C)
Pressure Control Range: 10 to 400 psi (0.69 to
27.6 bar)
Maximum Initial Pressures: 400 psi (27.6 bar)
Capacity: For specific capacity information,
consult the factory.
CONSTRUCTION
Bronze body, and spring chamber, stainless
steel Economizer seat, and pressure spring.
Teflon pressure buildup seat disc, and
diaphragm gasket. Bronze internal trim and
diaphragms.
In a typical installation, the Type PBE-2 should
be installed in the pressure build-up circuit
before the pressure build-up coil and the safety
relief valve. When installing the valve connect
the pressure build-up supply line to the inlet
connection identified on the valve body. The
direction of flow is also identified by an arrow
cast on the valve body. Connect the economizer
line to the oulet connection at the bottom of the
valve. Use a compatible sealant on the male
pipe threads and do not overtighten the valve
connections.
OPERATING INSTRUCTIONS
Adjusting the Delivery Pressure
The regulator's delivery pressure setting is
adjusted by means of the adjusting screw
(1) at the top of the spring chamber (4) after
loosening the adjusting screw lock nut (2).
To increase the delivery pressure, turn the
adjusting screw clockwise (into the spring
chamber). To decrease the delivery pressure,
turn the adjusting screw counter-clockwise (out
of the spring chamber). Tighten the adjusting
screw lock nut after the adjustment has been
made.
Type PBE-2
NOTE:
When adjusting the delivery pressure, allow a slight
pressure to continually flow through the valve. Close
tight to verify set pressure.
All parts commercially cleaned for cryogenic
service.
Also available in stainless steel.
GENERAL INSTALLATION INSTRUCTIONS
The Type PBE-2 regulator should be installed in
the horizontal position with the spring chamber
in the upright or inverted position. For other
installation requirements consult the factory.
For ease of operation and maintenance, it
is suggested that manual shut-off valves be
installed up-streamand downstream from the
valve. Prior to installing the valve the piping
should be thoroughly flushed out to remove any
foreign material to ensure for teh efficient and
trouble free operation for which the valve was
designed.
Emerson.com/FinalControl
© 2019 Emerson. All rights reserved.
VCIOM-13732-EN 19/08
CASH VALVE TYPE PBE-2 COMBINATION PRESSURE BUILDER/ECONOMIZER REGULATOR
INSTALLATION, MAINTENANCE AND REPAIR PARTS INFORMATION
MAINTENANCE INSTRUCTIONS
The following procedures are provided for
servicing the recommended spare parts for the
Type PBE-2 regulator. Repair parts can easily
be installed without removing the regulator
from the line.
Servicing the Piston Assembly (18), Cylinder
(15), Strainer Screen (16), and Bottom Plug
Gasket (17)
1. Unscrew the bottom plug (20) from the
valve body (14) and remove the bottom plug
gasket (17). The piston spring (19) and piston
assembly (18) will normally "drift" out with
the bottom plug.
HOW TO ORDER
NOTE:
It is not necessary to relieve the load on the pressure
spring (6) when removing parts through the bottom of
the valve.
"Repair Parts for Type PBE-2 Cryogenic
Service" and provide:
1. Valve size
2. Service
3. Inlet pressure
4. Outlet or delivery pressure range and
setting
5. Part description
6. Quantity of each part
7. Valve assembly or serial number stated
on the metal identification tag under the
adjusting screw lock nut
CAUTION
Before attempting to replace any spare parts,
be sure to shut off all pressure connections to
the valve. With the valve closed however, system
pressure could still be locked between the shut
off valve and the inlet and/or outlet sides of the
regulator. To avoid possible personal injury from
the trapped liquid or gases be certain to relieve
the pressure from ALL sides of the regulator
before proceeding with any valve service.
Refer to the Type PBE-2 cut away view for parts
identification.
Servicing the Pressure Spring (6),
Diaphragms (8) and Diaphragm Gasket (9)
1. Loosen the lock nut (2) ¼ turn and turn the
adjusting screw (1) counter-clockwise until
the pressure spring (6) is no longer under
tension.
NOTE:
When installing the adjusting screw during
reassembly , turn the screw clockwise until the lock
nut just touches the spring chamber. The pressure
setting should then be very close to its original setting.
2. Remove the assembly bolts (10) and nuts
(11) securing the spring chamber (4) to the
valve body (14). During reassembly, tighten
the screws evenly in an alternate diagonal
pattern.
3. Lift the spring chamber (4) from the valve
body, then remove the spring seat (5),
pressure spring (6), and pressure plate (7).
4. Remove the diaphragms (8) and diaphragm
gasket (9). It is recommended that
the gasket be replaced whenever the
diaphragms are replaced.
5. Remove the ball seat (12) and the seat
spring (13) from the protruding piston
pusher post. During reassembly, be sure the
ball seat is centered properly on the pusher
post of the piston.
6. Inspect all parts and replace if necessary.
Reassemble the parts in reverse order.
Then readjust the delivery pressure as
outlined under Operating Instructions.
2. Remove the strainer screen (16) from the
cylinder (15).
3. Unscrew the cylinder by turning in a
counter-clockwise direction and lift it out
of the valve body. Depending on how the
valve is installed, the seat spirng (13) may
come out when the cylinder is removed.
Inspect the cylinder for wear and replace if
necessary.
4. Examine the bottom plug gasket (17), and
the piston assembly (18), and replace if
necessary.
To order repair parts, refer to the cut away view
of the Type PBE-2 to identify the part required.
When ordering, please use the part names
listed and provide the valve serial number
stated on the identification tag. Also state the
following
NOTE:
The piston assembly (18) consists of the piston, pusher
post and seat disc and is offered only as a complete
assembly.
5. Reassemble the parts in reverse order.
When installing the piston assembly (18)
in the valve body, be sure the pusher post
and seat spring are properly positioned
within the cylinder. After placing the valve
in service, check and adjust the delivery
pressure setting as outlined under
Operating Instructions.
REPAIR PARTS INFORMATION
Refer to the Type PBE-2 cut away view for parts
identification.
SPECIFICATIONS
Each Type PBE-2 valve is supplied with a
pressure spring selected to provide a desired
pressure setting. The range of adjustment
or satisfactory "working range" of individual
springs is shown in the table below. Every
Type PBE-2 regulator has the "set" pressure
and range of adjustment stamped on a tag
fastened to the valve. The ranges shown in the
table are recommended for best performance.
2
CASH VALVE TYPE PBE-2 COMBINATION PRESSURE BUILDER/ECONOMIZER REGULATOR
INSTALLATION, MAINTENANCE AND REPAIR PARTS INFORMATION
BILL OF MATERIALS
Item No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Description
Adjusting screw
Lock nut
Name plate
Spring chamber
Spring button
Pressure spring
Pressure plate
Diaphragm
Gasket
Screw
Nut
Ball seat
Spring
14
Body
15
16
17
18
18A
18B
18C
18D
18E
18F
19
20
21
21A
21B
21AA
21BB
21C
21D
Cylinder
Screen
Gasket
Piston sub
Pusher post
Piston sub
Ball
Spring
Seal
Adapter
Piston spring
Bottom plug
Piston sub
Pusher post
Piston sub
Seat disc
Piston
Seal
Adapter
Materials
SST
SST
Aluminum
Bronze
Brass
SST
Brass
Bronze
Teflon
SST
SST
303 SST
SST
Bronze,
SST
Brass
Monel
Teflon
303 SST
SST
SST
SST
Teflon/SST
Brass
SST
Brass
303 SST
Teflon
303 SST
Teflon/SST
303 SST
Quantity
1
1
1
1
1
1
1
5
1
6
6
1
1
FIGURE 1
INLET
(3 Places)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OPTION-C
SPRING RANGES
Maximum Working Pressure (psi)
10-30
20-75
25-125
100-200
150-250
200-400
DIMENSION
Size
½"
A
4-½"
Dimensions
B
5-¼"
C
3"
Shipping Weight
(lbs)
9
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Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Cash Valve is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions,
Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.
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