Emerson CASH VALVE Installation Manual

CASH VALVE TYPES FR AND FR-6 BACK PRESSURE OR ECONOMIZER VALVES

CRYOGENIC INSTALLATION INSTRUCTIONS

Before installation, these instructions must be carefully read and understood.

DESCRIPTION

The Types FR and FR-6 are designed to function
as Back Pressure or Economizer valves in
Cryogenic Circuits. The Back Pressure function
is to open at a preset pressure and relieve inlet
pressure to the discharge side into a lower
pressure. The Economizer's function is to open
at a preset pressure above the Pressure Build
set pressure, and continue to open as gas
head pressure from heat leak builds during
non-use periods of the system. The Economizer
by-passes gas head pressure directly to the
Final Line circuit when system draw resumes,
drawing down the excess pressure rapidly and
re-closes before the Pressure Build regulator
opens. FR Series valves are not emergency
relief devices, but are designed for continuous
pressure regulation.

SPECIFICATION DATA

Service: Cryogenic liquids and gases
Sizes: 1-1/4", 1-1/2" and 2"
End Connections:

Threaded internal inlet and outlet

Available Body Materials:

Bronze or Stainless Steel

Temperature Rating:

+150°F (339K) to -320°F (78K)

Maximum Pressure:

FR: 400 psi (27.6 bar)
FR-6: 600 psi (41.4 bar)

Capacity:

For specific capacity information, consult the
factory.

GENERAL INSTALLATION INSTRUCTIONS

Connect the supply line to either the right or
left hand body connection. The remaining right
or left hand connection should be connected
to the service line or plugged depending on
the type of installation. The bottom connection,
which is indicated by an arrow on the valve
body, should be connected to the by-pass or
vaporizer line.

Before installing the valve, the piping and valve
should be thoroughly flushed out to remove any
foreign material. Use a compatible sealant on
the male pipe threads and do not over-tighten
the valve connections.

CONSTRUCTION

See component description for materials of
construction.

OPERATING INSTRUCTIONS

Adjusting the Delivery Pressure:

The regulator’s back pressure setting is
adjusted by turning the adjusting screw (2) at
the top of the spring chamber (5) after removing
the adjusting screw cap (1) and loosening the
adjusting screw lock nut (3). To obtain a higher
pressure setting, turn the adjusting screw
clockwise (into the spring chamber). To lower
the pressure setting, turn the adjusting screw
counter-clockwise (out of the spring chamber).
Tighten the adjusting screw lock nut after the
adjustment has been made and install the
closing cap.

MAINTENANCE INSTRUCTIONS

CAUTION

Before attempting to service the valve, be sure
to shut off the supply pressure and relieve all
pressure from BOTH sides of the valve. Refer to
the Type FR section view for parts identification. It
is not necessary to remove the valve from the line
for servicing.

Emerson.com/FinalControl © 2018 Emerson. All rights reserved. VCIOM-10799-EN 19/06

CASH VALVE TYPES FR AND FR-6 BACK PRESSURE OR ECONOMIZER VALVES

CRYOGENIC INSTALLATION INSTRUCTIONS

No. Content Description Construction

1 Adjusting Screw Cap Brass
2 Adjusting Screw Brass or SST
3 Lock Nut Brass or SST
4 Gasket Teflon
5 Spring Chamber Brass or SST
6 Spring Button Brass or SST
7 Pressure Spring SST
8 Name Plate Aluminum
9 Drive Screw SST
10 Nut SST
11 Washer SST
12 Pressure Plate Brass
13 Screw SST
14 Diaphragm Bronze or SST
15 Gasket Teflon
16 Ring SST

Diaphragm Ring

17

(FR-6 only)
18 O-ring Teflon
19 Ball Seat SST
20 Seat Ring SST
21 Body Seat Brass or SST
22 Body Bronze or SST

Brass

FIGURE 1

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Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Cash Valve is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions,
Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

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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.

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