SH-2000, SH-2500, AB-3000 Bimetallic Steam Traps

SH-2000, SH-2500, AB-3000 Bimetallic Steam Traps
SH-2000, SH-2500, AB-3000
Bimetallic Steam Traps
Installation and Operation Manual
SH-2500
SH-2000
AB-3000
65
Table of Contents
General Safety Information . . . . . . . . . . . . . .
2
Product Information. . . . . . . . . . . . . . . . . . 3
Product Installation . . . . . . . . . . . . . . . . . . 3
Maintenance Requirements . . . . . . . . . . . . . . 6
Troubleshooting. . . . . . . . . . . . . . . . . . . . 6
Repair Parts . . . . . . . . . . . . . . . . . . . . .
7
Limited Warranty and Remedy. . . . . . . . . . . . . 8
General Safety Information
This bulletin should be used by qualified personnel as a guide to the installation of Armstrong SH-2000, SH-2500, And AB3000 Bimetallic Steam Traps. Selection or installation of equipment should always be accompanied by competent technical
assistance. You are encouraged to contact Armstrong International, Inc. or its local sales representative for additional
information.
Caution: When working with high pressure/temperature steam, follow safe practices.
2
Product Information
Operation
Bimetallic type steam traps employ the temperature effect of a thermostatic bimetallic element. At start up, the steam traps
have the ability to handle large condensate loads while the system is heating up. At this point the bimetallic element is
contracted and the valve is fully open removing condensate and non-condensable gases from the system. When the system
reaches steam temperature, the high temperature causes the bimetallic element to expand, pulling the valve stem to close
the valve. The valve remains closed until enough condensate backs up cooling the bimetallic element. As the bimetallic
element cools, the valve slightly opens to pass condensate and vent non-condensable gases. When steam temperature is
achieved, the valve closes again.
Product Installation
Before installation, verify that the maximum allowable pressure/temperature and maximum operating pressure of the trap
are sufficient to handle the system design pressure and temperature. This information can be found on the label located on
the trap.
Steam trap installation is critical from both a performance and maintenance aspect. Installation of the trap is simplified if you
follow these guidelines.
1. Before installing the trap, ensure the line is clean. Blow down any strainers ahead of the trap.
2. Install the trap so that it is accessible for inspection and repair, below the drip point and close to the vertical drip leg.
3. The trap must be installed on a 2 bolt connector block (TVS-4000, IS2 or Standard Connector) See section “Installing
Connector Blocks and Steam Traps on Connector blocks” for more details. Armstrong recommends the trap to be
installed in a horizontal line.
4. Proper piping and drip legs of adequate size and diameter are essential for the successful operation of the Armstrong
bimetallic traps, see Chart 3-1 and Figure 3-1.
5. Isolation valves are needed before and after traps. When starting a new trap, be sure to open the valve slowly.
6. Due to the high temperatures of steam, it might be necessary to guard the traps for personnel safety.
Chart 3-1
Figure 3-1
H
Drip Leg Length
Minimum (in)
M
D
Steam Main
Size (in)
Drip Leg
Diameter (in)
Supervised
Warm-Up
Automatic
Warm-Up
1/2
1/2
10
28
3/4
3/4
10
28
1
1
10
28
2
2
10
28
3
3
10
28
4
4
10
28
6
4
10
28
8
4
12
28
10
6
15
28
12
6
18
28
14
8
21
28
16
8
24
28
18
10
27
28
20
10
30
30
24
12
36
36
3
Installing Connector Blocks and Steam
Traps on Connector blocks
Standard
The Standard connector block should be installed in piping with the flow direction stamp pointing in the correct direction as
indicated on the connector block.
• The trap will then be bolted to the connector block after the connector block has been installed.
• When installing the trap to the connector block, apply 35-50 ft-lbs of torque to the bolts using a 9/16” wrench. Allow
2.5” clearance for bolt installation and removal.
• When starting a trap, be sure to open the valve slowly.
Note: Armstrong strongly recommends adding an upstream strainer and isolation valves upstream and downstream of the
trap. Refer to figures 4.1 and 4.2.
Figure 4.1
Figure 4.2
Isolation
Valves
Isolation
Valves
Strainer
Blowdown
Valve
Standard
Connector
Strainers
Test Valve
Blowdown
Valve
Standard
Connector
Test Valve
IS2
The IS2 connector block should be installed in piping with the flow direction stamp pointing in the correct direction as
indicated on the connector block.
• The trap will then be bolted to the connector block after the connector block has been installed.
• When installing the trap to the connector block, apply 35-50 ft-lbs of torque to the bolts using a 9/16” wrench. Allow
2.5” clearance for bolt installation and removal.
• When starting a trap, be sure to open the valve slowly.
Note: Armstrong strongly recommends isolation valves upstream and downstream of the trap. Refer to figures 5.1 and 5.1.
4
Figure 5.1
Figure 5.2
Isolation
Valves
Isolation
Valves
Blowdown
Valve
IS2
Connector
Test Valve
IS2
Connector
Test Valve
Blowdown
Valve
TVS-4000
The TVS-4000/F connector block should be installed in piping with the flow direction stamp pointing in the correct direction
as indicated on the connector block.
• The trap will then be bolted to the connector block after the connector block has been installed.
• When installing the trap to the connector block, apply 35-50 ft-lbs of torque to the bolts using a 9/16” wrench. Allow
2.5” clearance for bolt installation and removal.
• When starting a trap, be sure to open the valve slowly.
Note: The TVS-4000 has integral strainer and isolation valves. Refer to figures 5.3 and 5.4.
Figure 5.3
Blowdown
Valve
Figure 5.4
TVS4000
Connector
TVS4000
Connector
Blowdown
Valve
5
Maintenance Requirements
High pressure drips traps should be tested at least three times per year.
When the bimetallic steam trap is suspected of malfunctioning, it can be checked by observing the discharge of the trap.
Normal trap operation would be indicated by:
• Trap discharging condensate continuously (modulating)
• Trap discharge in cycles (on-off)
All discharges are accompanied by large amounts of flash steam.
Do not confuse the discharge of flash steam with live steam loss. If the trap continues to blow live steam, isolate the trap
and repair or replace.
Troubleshooting
Whenever a trap fails to operate and the reason is not readily apparent, the discharge from the trap should be observed.
If the trap is installed with a test outlet or discharges to atmosphere, this will be a simple matter - otherwise, it will be
necessary to break the discharge connection.
1.
Cold Trap - No Discharge
No condensate or steam coming to trap.
a) Stopped or plugged strainer ahead of trap.
b) Broken valve in line to trap.
c) Pipe line or elbows plugged.
d) Pressure reducing valve out of order.
e) Isolation valves are off/closed
Caution: Superheated steam is invisible. Do not place objects directly in the path of trap discharge. In a blow through
situation a loud roar should be heard even though there may not be visible steam.
2.
Steam Loss:
If the trap leaks or blows live steam, trouble may be due to any of the following causes:
a) Valve may fail to seat
b) Piece of scale lodged in orifice
c) Worn parts
Imaginary Troubles: If it appears that steam escapes every time trap discharges, remember: Hot condensate forms flash
steam when released to lower pressure, but usually condenses quickly in the return line.
3. Continuous Flow
A. Trap not up to temperature. Allow more time for condensate removal (on start-up).
B. On large loads the traps is working fine as designed.
If the trap is found defective:
1. Isolate the trap
2. Blow down/bleed off the internal pressure
3. With the connector block in line, remove the two bolts that hold the trap to the connector block using a 9/16 wrench.
4. Remove the trap from the connector block
5. Replace the failed trap with a working trap (refer to the installation section for details on how to install)
6
Repair Parts
SH-2000: does not have repair part. If the trap fails, a new one will need to be installed
SH-2500: does not have repair part. If the trap fails, a new one will need to be installed
AB-3000
• Remove the steam trap from the connector block by taking the two bolts out
• Unscrew and lift the cap
• Unscrew and replace the bimetallic element
• The distance between the flat bimetallic element and the seat should be 2 mm
• Clean or replace the screen
• Put the cap back on the body and screw the cap
• Bolt the trap back to the connector block
7
Limited Warranty and Remedy
Armstrong International, Inc. or the Armstrong division that sold the product (“Armstrong”) warrants to the
original user of those products supplied by it and used in the service and in the manner for which they are
intended, that such products shall be free from defects in material and workmanship for a period of one (1) year
from the date of installation, but not longer than 15 months from the date of shipment from the factory, [unless
a Special Warranty Period applies, as listed below]. This warranty does not extend to any product that has been
subject to misuse, neglect or alteration after shipment from the Armstrong factory. Except as may be expressly
provided in a written agreement between Armstrong and the user, which is signed by both parties, Armstrong
DOES NOT MAKE ANY OTHER REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR ANY IMPLIED WARRANTY OF FITNESS
FOR A PARTICULAR PURPOSE.
The sole and exclusive remedy with respect to the above limited warranty or with respect to any other claim
relating to the products or to defects or any condition or use of the products supplied by Armstrong, however
caused, and whether such claim is based upon warranty, contract, negligence, strict liability, or any other basis
or theory, is limited to Armstrong’s repair or replacement of the part or product, excluding any labor or any other
cost to remove or install said part or product, or at Armstrong’s option, to repayment of the purchase price.
As a condition of enforcing any rights or remedies relating to Armstrong products, notice of any warranty or
other claim relating to the products must be given in writing to Armstrong: (i) within 30 days of last day of the
applicable warranty period, or (ii) within 30 days of the date of the manifestation of the condition or occurrence
giving rise to the claim, whichever is earlier. IN NO EVENT SHALL ARMSTRONG BE LIABLE FOR SPECIAL,
DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, LOSS
OF USE OR PROFITS OR INTERRUPTION OF BUSINESS. The Limited Warranty and Remedy terms herein apply
notwithstanding any contrary terms in any purchase order or form submitted or issued by any user, purchaser, or
third party and all such contrary terms shall be deemed rejected by Armstrong.
Armstrong International
North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstronginternational.com
65
Printed in U.S.A. - 12/14
© 2014 Armstrong International, Inc.
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