Instruction Manual

ManualsBrandsCashco ManualsSensorsB2

IOM-B2

11/13

MODEL B2

BACK PRESSURE REGULATOR

The Model B2 is a back pressure regulator used to control upstream (inlet or P

) 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.

SECTION II

II. INSTALLATION

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 outlet pressure gauge should be located ap-

proxi mately ten pipe diameters downstream, 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 re-

moved and not allowed to enter the regulator

upon startup.

8. Flow Direction: Install so the ﬂ ow 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.

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)

SECTION l

I. DESCRIPTION AND SCOPE

CAUTION

This is not a safety device and must not be substituted for a code approved pressure safety relief valve or a

rupture disc.

CAUTION

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.

Summary of content (8 pages)

PAGE 1
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-B2 11/13 MODEL B2 BACK PRESSURE REGULATOR SECTION l I. DESCRIPTION AND SCOPE The Model B2 is a back pressure regulator used to control upstream (inlet or P1) 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 recommendations.
PAGE 2
SECTION III III. PRINCIPLE OF OPERATION 1. Movement occurs as pressure variations register on the diaphragm. The registering pressure is the inlet, P1, or upstream pressure. The range spring opposes diaphragm movement. As inlet pressure drops, the range spring pushes the diaphragm down, closing the port; as inlet pressure increases, the diaphragm pushes up and the port opens. 2. A complete diaphragm failure will cause the regulator to fail closed. SECTION IV IV.
PAGE 3
2. If the regulator and system are to both be shut down, slowly close the inlet (upstream) block valve. Close the outlet (downstream) valve only if regulator removal is required. SECTION VI VI. MAINTENANCE WARNING SYSTEM UNDER PRESSURE. Prior to performing any maintenance, isolate the regulator from the system and relieve all pressure. Failure to do so could result in personal injury. A. General: 1.
PAGE 4
10. Lubricate the threads of the body (1) with a lightweight grease that is compatible with service use. Rotate the spring chamber (6) CW by hand onto the threaded portion of the body (1) until firmly seated against the diaphragm gasket (10). Tighten to the following torque value: ALL SIZES: 65–70 Ft lbs (88–95 Nm). 11. Pressurize with air and spray liquid leak detector around body (1) and spring chamber (6) to test for leakage.
PAGE 5
SECTION VII VII. TROUBLE SHOOTING GUIDE 1. Erratic operation; chattering. Possible Causes A. Oversized regulator; inadequate rangeability. Remedies A1. Check actual flow conditions, re-size regulator for minimum and maximum flow. A2. Increase flow rate. A3. Decrease regulator pressure drop; decrease inlet pressure by placing a throttling orifice in inlet piping union. A4. Install next step higher range spring. A5. Before replacing regulator, contact factory. 2. Regulator inlet (upstream) too high.
PAGE 6
SECTION VIII VIII. ORDERING INFORMATION NEW REPLACEMENT UNIT vs PARTS "KIT" FOR FIELD REPAIR To obtain a quotation or place an order, please retrieve the Serial Number and Product Code that was stamped on the metal name plate and attached to the unit. This information can also be found on the Bill of Material ("BOM"), a parts list that was provided when unit was originally shipped. (Serial Number typically 6 digits).
PAGE 7
Figure 2: Model B2 Item No. 1 2 3 4 5 6 7 IOM-B2 Description Repair Parts Kit B 7.1 7.2 7.3 7.4 7.
PAGE 8
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. We reserve the right to modify or improve the designs or specifications of such product at any time without notice. Cashco, Inc.