Pump Solutions Group Neptune Relief Valves User Manual

Relief Valves

Relief Valves

Features

• All wetted parts are 316SS or Carpenter 20

• Pressures from 30 to 2000 psi

• Spring guide for consistent relief capacity

• Easily adjustable relief setting

• Liquid service only

Neptune Relief Valves have two outstanding characteristics:

• economy • simplicity

Economy. Models RV-316-1, -2, -3 and -4 with all 316SS wetted
parts cost no more than other 304SS designs. Carpenter 20 valves
are also available as standard.

BULLETIN RV-08

Simplicity. Neptune’s exclusive design uses a self-cleaning ball check
and seat. It has a unique spring guide which assures proper spring
loading and consistent relief capacity. The relief pressure setting can
be easily changed by removing the top cap screw and locking set
screw, inserting a proper Allen wrench into the opening, and
adjusting the spring to the desired pressure.

Recommended setting: Operating
pressure plus 10% or 50 psi
whichever is greater.

SPECIFICATIONS

Inlet/Outlet pipe size:1⁄2" NPT

CAP SCREW

CAP NUT

CAP NUT GASKET

LOCK SETSCREW

ADJUSTING

SETSCREW

SPRING GUIDE

SPRING

VALVE BODY

SPRING SEAT

BALL CHECK

BALL SEAT

1

⁄2" MNPT

1

⁄2" FNPT

43⁄16"

13

1

⁄16"

1

⁄8"

1

MODEL PRESSURE CAPACITY

NUMBER (PSI) (GPM)

RV-316-1
RV-C20-1

RV-316-2
RV-C20-2

RV-316-3 1000 4.0

RV-316-4 2000 6.0

100 3.0

400 4.0

Quotation and Ordering Information

Please supply the following information:

1. Type of liquid to be handled.

2. Relief pressure range or set point required.

MATERIAL OF MODEL PRESSURE

CONSTRUCTION NUMBER RANGE (PSI)

Type 316 RV-316-2 101 to 400
Stainless Steel RV-316-3 401 to 1000

Carpenter 20

RV-316-1 30 to 100

RV-316-4 1001 to 2000

RV-C20-1 30 to 100
RV-C20-2 101 to 400

P.O. Box 247 • Lansdale, PA 19446-0247
Tel: [phone] • Fax: [phone]
Toll-Free Tel: 1- 888-3NEPTUNE (1- 888-363-7886)
Toll-Free Fax: [phone]
Web Site: http://www.neptune1.com
E-mail: [e-mail]

SOLD BY:

© 2008 Neptune Chemical Pump Company All Rights Reserved Bulletin RV-08 P/N ZL105624 Printed in U.S.A.

BULLETIN BP-08

Back Pressure and

Back Pressure and

Relief Valves

Relief Valves

Purpose

BACK PRESSURE VALVES maintain a set
pressure at the pump outlet port (discharge)
to assure accurate metering and are also used
to prevent syphoning. Use of the Back Pressure
Valve assures proper metering pump check valve oper­ation when the system pressure against which the pump
is injecting fluid is too low.

The Back Pressure Valve is a required accessory when pumping
to a low pressure injection point below the tank level or when
pumping from a bulk tank with a high head pressure.

RELIEF VALVES protect the piping and system from overpressure.
Discharge is piped to tank.

MODEL
BP-SS

Features

BACK PRESSURE VALVES

• Broad range of valve body materials

®

• Long life Teflon

• Field adjustable to a maximum
back pressure of 50 psi

• Low maintenance

RELIEF VALVES

• Broad range of valve body materials

• Long life Teflon

• Field adjustable to a maximum
pressure of 150 psi

• Low maintenance

• Two port design on 1/2" models

• Right angle, three port design on
3/4" and 1" models eliminate the
need for a separate “T” fitting in the
piping (two port design available
only for 1-1/2" units).

diaphragm

®

diaphragm

MODEL
BP-PVC