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cashco B2 Installation, Operation & Maintenance Manual

Back pressure regulator
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ISO Registered Company
I. DESCRIPTION AND SCOPE
The Model B2 is a back pressure regulator used to control upstream (inlet or P
3/8" NPT (DN8 and DN10) FNPT or 1/2" (DN15) with Tri-Clamp connections. The unit is suitable for gaseous
or liquid service. Refer to Technical Bulletin B2-TB for design conditions and selection rec om men da tions.
This is not a safety device and must not be substituted for a code approved pressure safety relief valve
or a rupture disc.
II. INSTALLATION
Installation of adequate overpressure pro tec tion
is recommended to pro tect the reg u la tor from
over pres sure and all down stream equip ment from
dam age in the event of regulator failure.
1. An inlet block valve should always be installed.
2. If service application is continuous such that
shut down is not readily accomplished, it is rec-
ommended that an inlet block valve, outlet block
valve, and a manual bypass valve be installed.
3. Pipe unions should be installed to allow removal
from piping.
4. An inlet pressure gauge should be located ap-
proxi mately ten pipe diameters upstream, and
within sight.
5. All installations should include a downstream
re lief de vice if the inlet pressure could exceed the
pres sure rating of any downstream equip ment or
the maximum outlet pressure rating of the unit.
6. Clean the pip ing of all foreign material including
chips, welding scale, oil, grease and dirt before
installing the reg u la tor. Strainers are rec om-
mend ed.
7. In plac ing thread seal ant on pipe ends pri or to
en gage ment, ensure that excess material is
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODEL B2
BACK PRESSURE REGULATOR
SECTION II
CAUTION
SECTION l
CAUTION
Recommended Piping Schematic for Back Pressure Regulator
re moved and not allowed to enter the regulator
upon startup.
8. Flow Direction: Install so the flow direction
match es the inlet stamp on the main regulator
body (1).
9. For best performance, install in well drained
hori zon tal pipe.
10. Basic Regulator - (Refer to Figure 2, Model B2):
Regulator may be rotated around the pipe axis
360°. Recommended position is with knob (4)
ver ti cal upwards.
11. Regulators are not to be buried un der ground.
12. For insulated piping systems, recommendation
is to not insulate regulator.
) pressure. Sizes are 1/4" and
1
IOM-B2
02-20

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Summary of Contents for cashco B2

  • Page 1 ) pressure. Sizes are 1/4" and 3/8" NPT (DN8 and DN10) FNPT or 1/2" (DN15) with Tri-Clamp connections. The unit is suitable for gaseous or liquid service. Refer to Technical Bulletin B2-TB for design conditions and selection rec om men da tions. CAUTION This is not a safety device and must not be substituted for a code approved pressure safety relief valve or a rupture disc.

  • Page 2: Principle Of Operation

    (up stream) block valve. Fully close the inlet (up- CAUTION stream) block valve. (When on bypass, the sys tem pres sure must be con stant ly observed and man u al ly Do not walk away and leave a bypassed regulator unattended. IOM-B2...

  • Page 3: Maintenance

    (7.5). Remove di a phragm gas ket (10). 3. Refer to Figure 2 for Model B2 basic reg u la- 5. Remove actuator nut (7.3) and separate all tor and Figure 1 for the diaphragm sub as- parts of the diaphragm subassembly (7).
  • Page 4 NOTE: Use only parts man u fac- vice use. Ro tate the spring chamber (6) CW tured and supplied by Cashco, Inc. for these by hand onto the threaded portion of the body products. See Section VIII.

  • Page 5: Troubleshooting Guide

    Replace range spring with proper lower range. adjusting screw does not allow bringing pressure level up to proper level). Too much rise (build). C1. Review rise (build) expected. C2. Contact factory. 3. Sluggish operation. Possible Causes Remedies Fluid too viscous. Heat fluid. Contact factory. IOM-B2...

  • Page 6: Section Viii

    – PARTS "KIT" for FIELD REPAIR: NEW REPLACEMENT UNIT: Contact your local Cashco, Inc., Sales Contact your local Cashco, Inc., Sales Rep re sen ta tive with the Serial Number and Product Rep re sen ta tive with the Serial Number and Product code.
  • Page 7 Figure 2: Model B2 Repair Parts Item No. Description Kit B Body Adjusting Screw Knob Nut Knob Spring Button Spring Chamber Diaphragm Subassembly Diaphragm ------------------------‡‡ Actuator Post with Seat (#8)--‡‡ Actuator Nut Actuator Gasket -----------------‡‡ Actuator O-ring ------------------‡‡ Diaphragm Gasket ----------------- ‡‡...
  • Page 8 POTENTIALLY EXPLOSIVE ATMOSPHERES REGULATIONS 2016 Cashco, Inc. declares that the products listed in the table below has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of products intended for use in potentially explosive atmospheres given in Annex II of the ATEX Directive 2014/34/EU and given in Schedule 1 of The Equipment and Protective Systems Indented for Use in Potentially Explosive Atmospheres Regulations 2016.
  • Page 9 5100, 5200, 5400 ,5500 4100, 4200, 4300, 4400, 4500, 4600 MISC 764P/PD, 764-37, 764T Cashco, Inc. Cashco GmbH Cashco do Brasil, Ltda. P.O. Box 6 Al.Venus, 340 Handwerkerstrasse 15 Ellsworth, KS 67439-0006 Indaiatuba - Sao Paulo, Brazil 15366 Hoppegarten, Germany...

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