Sentry BPRV Instruction manual

Original Instructions
sentry-equip.com
966 Blue Ribbon Circle North, Oconomowoc,WI 53066 U.S.A. | [phone] | suppor[email protected]
Installation, Operation &Maintenance Manual
Sentry BPRV Back Pressure Regulator
Pressure Conditioning
S-SW-IOM-00247-3 1-17
Do not install, maintain, or operate this equipment without reading,
understanding, and following the appropriate Sentry Equipment Corp
instructions. Otherwise, injury, damage, or both may result.
Copyright
© 2016 by Sentry Equipment Corp. All rights reserved. All product and company
names are property of their respective owners. This document contains
proprietary information. No part of this document may be photocopied or
reproduced without the prior written consent of Sentry Equipment Corp.
Limit of Liability
Sentry Equipment Corp, its employees, agents, and the authors and contributors
to this document specically disclaim all liabilities and warranties, express or
implied (including warranties of merchantability and tness for a particular
purpose), for the accuracy, currency, completeness, and/or reliability of the
information contained herein and/or for the tness for any particular use and/or
for the performance of any material and/or equipment selected in whole or part
with the user of/or in reliance upon information contained herein. Selection of
materials and/or equipment is at the sole risk of the user of this publication.
Note
The information contained in this document is subject to change without notice.
Safety Information
Please read the entire manual before attempting to unpack, set up, or operate this
product. Pay careful attention to all Warnings, Cautions, and Notes. Failure to do so
could result in serious personal injury and/or equipment damage.
Use of Hazard Information
If multiple hazards exist, the signal word corresponding to the greatest hazard
shall be used.
Denitions
DANGER indicates a hazardous situation
which, if not avoided, will result in death
or serious injury.
WARNING indicates a hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION, used with the safety alert
symbol, indicates a hazardous situation
which, if not avoided, could result in
minor or moderate injury.
NOTICE is used to address practices not
related to personal injury.
NOTE
Information that requires special emphasis.
TIP
Alternate techniques or clarifying information.
SHALL:
This word is understood to be mandatory.
SHOULD:
This word is understood to be advisory.
General Safety Precautions
Product Selection, Installation, and Use
Improper selection, installation, or use can cause personal injury or property damage.
It is solely the responsibility of users, through their own analysis and testing, to select
products suitable for their specic application requirements, ensure they are properly
maintained, and limit their use to their intended purpose.
Follow proper local, state, and federal regulations for proper installation and operational
requirements.
Always use caution and common sense when working with any chemical. Read
the product label and Material Safety Data Sheets (MSDS) carefully and follow the
instructions exactly.
Potential Equipment Hazards
Hot surfaces! This equipment may have very hot surfaces. If an operator contacts a hot
surface, injury may occur. Use protective clothing to prevent injury. If other equipment
comes in contact with a hot surface, damage to the equipment may occur. Ensure the
area around this equipment is kept clear to prevent this damage from occurring.
High pressures! This equipment may contain uids at very high pressures. Prior to
installing, removing, or maintaining this equipment, ensure that the equipment is
isolated from all connecting piping, the equipment is depressurized, the contents have
been drained, and the equipment is cool.
Standard Warranty
Sentry Equipment Corp (“Seller”) warrants products manufactured by it and
supplied hereunder (“Products”) to be free from defects in workmanship and, to
the extent materials are selected by Seller, to be free from defects in materials, in
each case for a period as dened in the table below:
Brand Product Line Warranty Period
Sentry® Steam & Water Sampling Products and Systems
Solid & Powder Sampling Products and Systems
Gas Sampling Products and Systems
Liquid & Slurry Sampling Products and Systems
Pipeline Integrity Products
Eighteen months from
date of shipment or
twelve months from
startup (whichever
occurs rst)
Waters
Equipment
Steam & Water Sampling Products and Systems Twelve months from
date of shipment
To view the full warranty, go to
www.sentry-equip.com/warranty.

Spare Parts List
6-04084A – BPRV Diaphragm Replacement Kit
Customer Support
With proven sampling expertise since 1924, Sentry products and services
provide business operations the critical insights to optimize process control and
product quality. We deliver true representative sampling and analysis techniques
to customers around the globe, empowering them to accurately monitor and
measure processes for improved production efficiency, output, and safety.
Standing behind our commitments, we are determined to tackle any application,
anywhere.
We know that running an efficient operation isn’t easy. It requires thorough,
careful analysis of controlled, real-time data achieved through reliable, accurate,
and repeatable process monitoring and measuring. By effectively conditioning,
sampling, and measuring gas, liquid, slurry, powder, solids, steam, or water within
their production environments, our customers obtain the critical insights they
need to control and optimize their processes.
Yet, controlling your processes also means reliable customer support throughout
the life cycle of your equipment.

Customer Service—General information, warranty claims, order management.

Installation Service—For systems that require specialized expertise upon
installation.

Technical Support—Troubleshooting, training, and technical manuals.

Field Service & Retrots—When a problem needs immediate attention.

Replacements Parts & Consumables—Order your replacement parts and
consumables.

Sentry ProShield Services—Select from four ProShield Guardian service plans
providing different levels of support to protect your large system investments
with regularly scheduled maintenance.
To learn more, go to
www.sentry-equip.com/support.
Figure 3.
General Description
When installed in a system as
shown in Figure 1, the Sentry®
Back Pressure Regulator/Relief
Valve (BPRV) holds a constant
pressure of approximately 20
psig (1.4 barg) at the analyzer
inlet. This pressure is maintained
independent of source pressure
uctuations or sample ow
changes. If inlet pressure rises,
the regulator opens to let excess
ow pass through to drain. This
ow is usually used as the grab
sample. This unit also acts as a
relief valve in the event of an
over-pressure condition.
Installation
The Sentry BPRV should be
installed in sequence according
to Figure 1. The BPRV only has
to control pressure between 20
psig (1.4barg) and atmosphere.
This allows very precise pressure
control, minimizes plugging and ensures reliability. Connections on the BPRV are
¼" NPT Female and wetted materials are 316 SS and Viton®.
Operation
In the normal mode of operation, there should always be a ow from the exhaust
port. This ow will increase with rising source pressures and decrease with falling
source pressures, unless the Sentry VREL® valve is reset to maintain the total line
ow at the set point. The Sentry BPRV also functions as a fail safe relief valve. The
relieving capacity exceeds that of the most commonly used 1/4" relief valve. Since
the BPRV is always in service, a malfunction is immediately evident. A relief valve
can freeze with no outward indication until it fails to operate in an emergency.
Maintenance
Basic maintenance of the BPRV generally consists of cleaning and/or replacement
of the diaphragm. Follow the directions below to disassemble and reassemble the
BPRV for maintenance.
The BPRV is spring loaded. Do not remove the six screws that hold the housing to the
valve body without rst reading these instructions completely.
Required Materials
#2 Phillips screwdriver
#8-32 x 3" screws (qty 3)
Safety glasses
Torque wrench
Disassembly & Reassembly
1. Remove three (3) of the six (6)
#8-32x1/2" screws which hold
the spring housing to the body.
The screws that are removed
should be 120 degrees apart
(gure 2).
2. Replace the three (3) 1/2"-long
screws with three (3) #8-32 x 3”
screws, tightening them until the
screw heads bottom out on the
body ange.
3. Remove the three (3) remaining
1/2"-long screws.
4. Alternately loosen the 3"-long
screws until compression is
relieved from spring.
5. Clean or replace parts as
required.
6. For re-assembly, reverse the
above procedure using the 3”-long
screws as jack screws to reapply compression to the spring.
7. Check the tightness of all six (6) screws with a torque wrench. Alternate from
one side to the other, until all six are tightened to 16in-lb (1.8 Nm).
Figure 1.
Figure 2.
Screw
Screws
Label
Housing
Spring
Poppet
Retainer Nut
O-ring
Diaphragm
Assembly
Spring
Needle Seat
Body
Screw Spring
Housing
Label
Screw
Spring
Diaphragm
Assembly
Poppet
O-ring
Body
Needle Seat
Retainer
Nut IN OUT