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spirax sarCo, inC.
1150 northpoint blvd.
1
blythewood, sC 29016 4
t: 800.883.4411 th
or: 803.714.2000 e
f: 803.714.2222 d
www.spiraxsarco.com/us itio
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spC1007 printed in usa 5/2012 Copyright 2012 spirax sarco, inc.
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Mechanical
Products
Manual
14th Edition
Copyright © 2012 by Spirax Sarco, Inc.
Spirax Sarco Product Manual
Fourteenth Edition
All rights reserved.
No part of this publication covered by the copyrights hereon may be reproduced or copied in any form
or by any means graphic, electronic, or mechanical without written permission of Spirax Sarco, Inc.
Printed in the United States of America 5/2012
Spirax Sarco has a broad range of products tailored to meet the vast needs of
steam and process fluid users everywhere. For years, Spirax Sarco has fulfilled
these needs and today strives to improve this technology as we are in the 21st
Century.
Steam technology contributes to our way of life in the manufacturing of just
about everything we eat, drink, wear or use whether in our homes or the facilities
in which we work. Steam is the prime carrier of heat in process industry, as well
as an efficient means of space heating, and it is also gaining importance as a
sterilizing medium. Spirax Sarco is committed to the development and use
of steam and for over 90 years the company’s vast knowledge of steam
applications in conjunction with its wide product range has become an inte-
gral part in energy conservation in industry as well as commercial applications
throughout the world.
Today, the Spirax Sarco companies employ more than 3,700 people around
the world giving total customer support through 105 Spirax Sarco sales offices
and offices in 37 countries – all of these in close contact with engineers and
designers of plants.
This close knit relationship assures customer satisfaction everywhere and
in- turn ensures the adaptability of the Spirax Sarco factories in the United
States, North and South America, Europe, the Far East and Africa to the
ever-changing world around us.
Spirax Sarco is committed to quality and excellence now and into the future.
The best choice for reliable equipment to fulfill the needs of steam
and process fluid users with the right price, at the right place and time.
To contact your local Spirax Sarco Representative, call:
Toll Free 1-800-883-4411
iii
How To Use This Book
Accepted international designations for limiting conditions are used throughout this catalog.
An explanation of Pressure Shell Design Conditions and Limiting Operating Conditions follows:
Pressure Shell Design Conditions:
• PMA - Maximum Allowable Pressure
• TMA - Maximum Allowable Temperature
These are the maximum pressures and temperatures to which the pressure shell (body, cover, bolt-
ing, etc.) of the product may be safely and permanently exposed. The product may or may not operate
properly at these maximum conditions; the internal parts may be damaged or destroyed, but the pres-
sure-retaining components will not break or become permanently distorted. It is sometimes permissible
to exceed the maximum allowable conditions temporarily. For example, a cold hydraulic test at 1-1/2
times the cold PMA is usually permitted.
Because the maximum allowable pressure depends on the temperature, there is no one value for
PMA. Quoting only the cold PMA without mentioning the corresponding temperature could be mislead-
ing. PMA is usually given at three temperatures:
• Cold
• Maximum Allowable Saturated Steam Temperature
• Maximum Allowable Temperature
There is only one value for maximum allowable temperature (TMA); the corresponding pressure
range is given in this literature.
PMA and TMA are strictly safety related. They have very little to do with the actual operation of the
product.
Limiting Operating Conditions:
• Maximum Operating Pressure - PMO
• Maximum Operating Temperature
PMO is the maximum fluid (steam, gas or liquid) pressure at which the product will operate properly.
Depending on the type of product, PMO may or may not be related to temperature. Unless otherwise
indicated, the downstream pressure is assumed to be 0 psig.
Maximum operating temperature may depend on superheat tolerance, internal materials (e.g. neo-
prene o-rings), pressure shell design conditions, or any combination of these factors. Depending on the
type of product, it usually varies with the actual operating pressure.
An example on the opposite page graphically illustrates limiting conditions.
iv
Example of Limiting Conditions
BPT21 Steel-Bodied Balanced Pressure Thermostatic Steam Trap
Limiting Operating Conditions
Maximum Operating Pressure (PMO) 304 PSIG
Maximum Operating Temperature 437˚F at 304 PSIG; 90˚F of Superheat at
Operating Pressures below 282 PSIG
Pressure Shell Design Conditions
PMA (Maximum Allowable Pressure) 362 PSIG/0-248˚F
309 PSIG/424˚ F
188 PSIG/752˚F
TMA (Maximum Allowable Temperature) 752°F/0-188 PSIG
TMA
752ϒF / 0-188 psig
800 PMA (at TMA)
188 psig / 752ϒF
600
90ϒF of Superheat at 282 psig
437ϒF at 304 psig
Max. Operating Temperature
PMA (at Saturated Steam
Temperature) 309 psig / 424ϒF
400
90ϒF
Pressure Shell Design
Conditions
Saturated Steam
200
F
ϒre PMO — 304 psig 362P pMsAig (/c 0o-l2d4)8ϒF
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100 200 300 400
Pressure PSIG
v
MASTER INDEX
Regulators index 1: 3
Direct Operated Temperature Regulators 1: 6
Direct Operated Pressure Regulators 1: 36
Pilot Operated Pressure Regulators 1: 48
Pilot Operated Temperature Regulators 1: 72
Noise Attenuators 1: 103
Safety Valves 1: 110
Steam Traps index 2: 127
Universal Connector and Traps 2: 130
Thermo-Dynamic® 2: 146
Float & Thermostatic 2: 158
Balanced Pressure 2: 190
Inverted Buckets 2: 206
Liquid Expansion 2: 226
Bimetallic 2: 232
Fault Detection 2: 238
Trap Station & Manifolds 2: 250
Condensate Recovery index 3: 259
Non-Electric Pumps 3: 260
Electric Pumps 3: 312
Strainers index 4: 327
High Purity index 5: 365
Liquid Drain Traps index 6: 399
Pipeline Auxiliaries index 7: 433
Humidification index 8: 515
Engineered Products index 9: 519
Engineering Data Eng. 536
Regional Offices 546
Model Designation Index 547
TIS MASTER INDEX US
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to maximize steam system efficiency.
Improved process efficiency and product quality through
accurate control of pressure.
