EMERSON Spence VCIMD-14991 Thermostatic Bellows Steam Trap Instruction Manual

Spence VCIMD-14991 Thermostatic Bellows Steam Trap
Instruction Manual

WARNING

Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion, fire, and/or chemical contamination causing property damage and personal injury or death.
B Series steam trap must be installed, operated, and maintained in accordance with federal, state, and local codes, rules, and regulations, and Emerson Process Management Regulator Technologies, Inc. (Emerson) instructions.
If a leak develops in the system, service to the unit may be required. Failure to correct trouble could result in a hazardous condition.
Installation, operation, and maintenance procedures performed by unqualified personnel may result in improper adjustment and unsafe operation. Either condition may result in equipment damage or personal injury. Only a qualified person shall install or service the B Series steam trap.

Introduction

Scope of the Manual
This manual provides instructions for installation, maintenance, and parts information for the B Series Thermostatic Bellows Steam Traps.

Product Description
The B Series Thermostatic Bellows Steam Traps have a balanced pressure design with stainless steel welded actuator capable of discharging condensate within 10°F / 12°C of saturated temperature.
The thermostatic actuator employs a conical valve lapped in matched sets with the seat ring assuring tight shut off.

Specifications

The specifications section on this page provides the ratings and other specifications for the B Series.

Available Configurations
Type B33:
1/2 NPT / 12.7 mm straight through the trap
Type B43:
3/4 NPT / 19.1 mm straight through the trap
Type B53:
1 NPT / 25.4 mm straight through the trap
Type B63:
1-1/4 NPT / 31.8 mm straight through the trap
Type B73 (1):
1-1/2 NPT / 38.1 mm straight through the trap
Type B83 (1):
2 NPT / 50.8 mm straight through the trap
Maximum Allowable Pressure (2)
250 psig / 17.2 barg| Maximum Operating Pressure (2)
250 psig / 17.2 barg
Maximum Differential Pressure (1)
250 psig / 17.2 barg
Maximum Operating Temperature (2)
450°F / 232°C
Materials of Construction
Body and Cover: Cast Iron ASTM A278 Class 30
Actuator: Welded Stainless steel Cover and Gasket: Graphite
Valve and Seat: Hardened 416 Stainless steel
Options
SLR Orifice
HC – High Capacity Orifice
---|---

1. Add (-HC) at the end of the type number for high capacity.
2. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

Principle of Operation

The thermal actuator is filled at its free length with a liquid having a lower boiling point than water. On start-up, the valve is normally open. When steam enters the trap, the thermal actuator fill vaporizes to a pressure higher than line pressure. These forces valve into the seat orifice to prevent any further flow. As condensate collects, it takes heat from the thermal actuator, lowering internal pressure. Line pressure will then compress the thermal actuator to open the valve and discharge condensate. Valve opening automatically adjusts to load conditions from minimum on very light loads to full lift at maximum load.

Installation

WARNING
Personal injury or system damage may result if this steam trap is installed, without appropriate overpressure protection, where service conditions could exceed the limits given in the Specifications section and/or steam trap nameplate.
Additionally, physical damage to the steam trap may result in personal injury or property damage due to escaping of accumulated gas. To avoid such injury and damage, install the steam trap in a safe location.
All pressure equipment should be installed in a non-seismic area; should not be exposed to fire, and should be protected from thunderbolt (lightning) strikes.

1. Before installing the trap, blow steam through equipment and piping to remove scale, pipe threading chips, and other dirt.
   Note: Emerson Thermostatic Bellows Traps do not require a change of body or cover for different pressures.

2. Check arrows on the trap body or cover to ensure that the flow direction is correct. See Figure 2 for recommended installation.

Installation Recommendations

1. Use a separate trap for each unit, coil, surface, chest, etc.

2. Include unions in inlet and outlet piping if the trap will be removed from the installed location for cleaning and maintenance.

3. For piping conditions in step 12, for siphon-drained equipment, and for tilting jacketed kettle, specify traps with “steam lock release valves” (SLR).

4. Provide condensate-collecting pockets for traps draining steam mains, headers, risers, and branches.

5. Ensure that the return main is large enough to handle the condensate from all traps discharging into it, without causing excessive back pressure.

6. Always discharge high and low-pressure traps into separate return mains.
   Note: Do not insulate the trap or the piping and fittings between the equipment outlet and trap inlet unless absolutely essential.
   Do not use piping, nipples, and fittings smaller than the trap connection size.

7. If possible, do not install a trap with a long horizontal run of piping between the equipment outlet and the trap inlet. If such a hook-up is necessary, specify traps with “steam lock release valves” (SLR).

8. Do not include a by-pass around the trap unless the equipment drained must be kept in operation while the trap is being cleaned or serviced.

9. Do not jeopardize the advantage of a freezeproof trap by lifting the condensate or by the use of horizontal piping from the trap outlet without a considerable pitch in the direction of flow or by piping the trap in any way which will prevent fast gravity drainage when steam is turned off.

Maintenance

WARNING
To avoid personal injury, property damage, or equipment damage caused by the sudden release of pressure or explosion of accumulated gas, do not attempt any maintenance or disassembly without first isolating the steam trap from system pressure and relieving all internal pressure from the steam trap.
Steam traps that have been disassembled for repair must be tested for proper operation before being returned to service. Only parts manufactured by Emerson should be used for repairing this steam trap.
Due to normal wear or damage that may occur from external sources, this steam trap should be inspected and maintained periodically. The frequency of inspection and replacement of parts depends upon the severity of service conditions or the requirement of local, state, and federal rules and regulations.
Do not remove the cover while the trap is very hot. Wait until steam pressure has dropped and the trap can be comfortably touched with a bare hand.
CAUTION
Never open the steam shut-off valve rapidly. Condensate always collects at the upstream side of a closed, untrapped steam valve. Warhammer, destructive to equipment, piping, and traps can be initiated by quick opening of such valves.

1. Adopt a reasonable “Preventive Maintenance” program to schedule all traps for internal inspection and cleaning.
2. Do not drop traps or spare bellows.
3. Do not use a Stillson or Monkeywrench to remove or replace bellows or tighten them excessively in the trap cover.
4. Do not store, pile, or carry bellows with tools and pipe fittings.
5. Most trap operating difficulties and failures are caused by circumstances that the trap cannot control. Some examples are pipe scale, dirt, water-hammer, corrosive condensate, improper installation, and inaccessible location. Try to avoid or correct these detrimental conditions.
6. Ensure to regularly blow down and clean strainers and dirt pockets.

Testing

1. Periodically test the operation of all traps, which are piped so the discharge will not be observed. Use a three-way test valve for visual discharge. A stethoscope or ultrasonic device can be utilized for testing intermittent discharge types of traps. If test valves have not been installed, check the temperatures of the inlet and outlet piping close to the trap. Use a surface pyrometer or an infrared temperature device to detect temperature. Check for the following conditions:
   a. If inlet piping is hotter than outlet piping, with temperature of latter rising and falling in sequence with trap discharge, trap is satisfactory.
   b. If inlet piping is considerably cooler than known temperature of the steam supplied to equipment drained, trap is either not discharging or is too small for the application.

2. The recommended frequency of trap testing depends on the importance of each application and the operating conditions.

Troubleshooting

Table 1. Troubleshooting

WHEN THIS HAPPENS| HERE IS WHERE THE TROUBLE MAY BE| AND HERE IS WHAT TO DO
---|---|---
Trap not discharging –
cool to touch| 1. Condensate not reaching the trap:
a. Pipe and fittings between equipment and trap plugged by dirt.
b. Strainer clogged by dirt.| a. Remove the obstruction.
b. Blow out or clean the strainer.
2. Condensate not passing through trap.
a. Trap discharge orifice blocked by dirt.
b. Pipe and/or fittings between trap and return man plugged by dirt.| a.Clan trap and install strainer.
b.Remove obstruction.
3. Valve. upstream or downstream. not open or failed in the closed position.| Open or repair the valve.
4. Bellows have developed a leak or crack.| Replace the bellows. Check for corrosive condition and. if present. substitute bellows material.
Trap discharging condensate continuously – warm to touch| 1. Trap, strainer, or piping partially obstructed by dirt.| Remove the obstruction. blow down the strainer and clean the trap.
2. Valve, upstream or downstream. not open wide.| Open the valve wide.
3. Trap too small for condensate load.| Add another trap in parallel or replace it with a larger trap
4. Condensate load has increased since the trap was installed.
a.Boiler priming or foaming.
b.Leak in a submerged coil of equipment.
c.Other traps have failed to transfer condensate to overloaded trap.| a. Correct the boiler condition.
b. Repair leak or replace coil/tube.
c. Locate and repair/replace faulty traps.
Trap discharging live steam| 1. Trap valve not closing tight
a. Scale or dirt between valve and seat.
b. Valve or seat or both. eroded and worn.| a . Clean trap and install strainer.
b . Replace the valve and seat with a matched set.
2. Trap has been dropped – bellows misaligned so the valve cannot seat.| Replace the bellows and inspect the trap for other damage.
3. Mistaking open or leaking by-pass valve for trap leak.| Remove the by-pass if permissible. otherwise, close or repair the valve.
4. Bellows damaged by water hammer.| Replace bellows. eliminate the cause of the water hammer.
Slow warm-up or temperature of equipment drained too low.| 1. Steam pressure is too low for the temperature required by the process.
a. Pressure throttled by thermostatically controlled steam supply valve.
b. Increased demand for steam throughout the plant.
c. Steam piping is too small for adequate supply.| a. Check for the lowest throttled pressure and increase it if feasible.
b. Increase boiler capacity if possible. Shut down
unneeded equipment.
c. Increase steam pressure or replace piping with a larger size.
2. Pressure differential across trap too low.
a.Steam pressure less than when trap was installed.
b.Return line pressure higher than when the trap was installed.| a. Raise pressure to the former level.
b. Retum main is too small. Other traps discharge live steam into the return main. Repair or replace faulty traps. Obstruction in return main or discharge piping.
3. Short circuiting caused by group trapping.| See Installation Step 5.
4 Trap steam-locked.
a. Long horizontal piping between equipment and trap.
b. Trap above drain outlet of equipment – no water seal at bottom of the riser.
c. Siphon-drained equipment – rotary dryers and tilting
jacketed kettles.| a. See Installation Step 2.
b. See Installation Step 13.
5. Apparatus drained by siphon pipe.| Examine the siphon for break or leak.

Repair

1. Wait until the trap is cool to the touch.

2. Remove cover – remove and discard the old gasket.

3. Remove the valve seat from the body.

4. Examine bellows by:
   a. Comparison to new bellows.
   b. Immersing in cold and hot water to test bellows’ travel.

5. If bellows are not damaged, reassemble into cover; if damaged, replace. Leave threads of bellows dry, tighten into trap cover and be sure to not over torque.

6. Examine valve and valve seat
   a. Clean with 80 to 150 grit emery. If no wear is present, the valve and seat can be reused; if damaged, replace them. Use a small amount of anti-seize compound on the seat and valve threads. The valve and seat should be torqued for a snug fit.

7. Insert new gasket.

8. Reassemble the cover using a small amount of anti-seize compound on the cover threads if the trap has a screwed cover. If the cover is bolted, use an anti-seize compound on the bolts.

9. The seating of the cover gasket may be checked by installing a pipe plug-in outlet of the trap and applying 80 PSIG / 5.52 barg air to the inlet. Use soapy water or leak-detection fluid. A slight seepage should be acceptable since air can pass through a small opening that steam will not.

10. If possible, test the trap before returning it to service. Any pressure within the trap range can be used; a simple drip leg will suffice. The valve in the trap should close on steam. Leave the trap on the line long enough for the trap to cycle once.

Parts Ordering

When corresponding with your local Sales Office about B Series, always reference the assembly number.
Parts List

1 and 1-1/4 NPT
3/4 NPT
1/2 NPT| WAL0046426
WAL0046425
WAL0046424
2| Cover Flange, Cast Iron
3/4 NPT
1/2 NPT
1-1/2 and 2 NPT
1 and 1-1/4 NPT| WAL421146
WAL421145
WAL421148
WAL421147
3| Gasket, Graphite
1/2 NPT
3/4 NPT
1 and 1-1/4 NPT
1-1/2 and 2 NPT| WAL621161
WAL621162
WAL621163
WAL621164
4| Bellows, Stainless Steel
1/2 NPT
3/4, 1, 1-1/4, 1-1/2, and 2 NPT| WAL0015493
WAL0015498
5| Seat, Stainless Steel
1-1/2 and 2 NPT
1 and 1-1/4 NPT
1/2 NPT
3/4 NPT| WAL421193
WAL421191
WAL421187
WAL421189
6| Seat Gasket
1/2 NPT
1-1/2 and 2 NPT
1 and 1-1/4 NPT
3/4 NPT| WAL0055100
WAL0055104
WAL0055102
WAL0055101
7| Body, Cast Iron
1-1/2 NPT
1-1/2 NPT HC
2 NPT
2 NPT HC
1/2 NPT
1-1/4 NPT
1 NPT
3/4 NPT| WAL421127
WAL421221
WAL421128
WAL21222
WAL421123
WAL421126
WAL421125
WAL421124

Table 2. B Series Spare Parts Kit

MODEL| SIZE, NPT| HIGH-CAPACITY STEAM TRAPS THERMOSTATIC KITS (1)(2)  PART NUMBER| COVER GASKETS PART NUMBER
---|---|---|---
B31 and B33| 2-Jan| WAL5723400| WAL0621161
B41 and B43| 4-Mar| WAL5724600| WAL0621162
B51, B61, B53, and B63| 1 to 1-1/4| WAL5726600| WAL0621163
B71, B81, B73, and B83| 1-1/2 to 2| WAL5718600| WAL0621164
1. Kits include valve, seat ring, bellows, and required gaskets.
2. With steam lock release (SLR) option.

SpenceValve.com
Emerson Automation Solutions

Americas
McKinney, Texas 75070 USA
T +1 800 558 5853
+1 972 548 3574| Asia Pacific
Singapore 128461, Singapore
T +65 6777 8211
---|---
Europe
Bologna 40013, Italy
T +39 051 419 0611| The Middle East and Africa
Dubai, United Arab Emirates
T +971 4 811 8100

VCIMD-14991 © 2021 Emerson Electric Co. All rights reserved. 11/21
Spence is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective 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.
Emerson Electric Co. does not assume responsibility for the selection, use, or maintenance of any product. Responsibility for the proper selection, use, and maintenance of any Emerson Electric Co. product remains solely with the purchaser.

www.SpenceValve.com
VCIMD-14991
November 2021
0011534-B

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