Page 1
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: 215-699-8700 • Fax: 215-699-0370
Toll-Free Tel: 1- 888-3NEPTUNE (1- 888-363-7886)
Toll-Free Fax: 1- 800-255-4017
Web Site: http://www.neptune1.com
E-mail: pump@neptune1.com
SOLD BY:
© 2008 Neptune Chemical Pump Company All Rights Reserved Bulletin RV-08 P/N ZL105624 Printed in U.S.A.
Page 2
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
Page 3
Specifications
BACK PRESSURE VALVES
MODEL
NUMBER PRESS. (GPH)
SIZE
.MAX.
SET FLOW
@ 50 PSI
MATERIALS
OF
CONSTRUC.
DIAPHRAGM
ABC D
DIMENSIONS
BP-SS 1/2" 100 4.600" 2.375" 1.125" 1/2" FNPT
BP-SS-75 3/4"
BP-SS-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
50 psi
150
316SS TFE
5.500" 3.500" 1.125" 3/4" FNPT
BP-SS-150 11⁄2" 800 9.000" 4.500" 2.100" 11⁄2" FNPT
BP-KY 1/2" 100 4.600" 2.375" 1.125" 1/2" FNPT
BP-KY-75 3/4"
BP-KY-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
50 psi
150
Kynar TFE
5.500" 3.500" 1.125" 3/4" FNPT
BP-KY-150 11⁄2" 800 9.000" 4.500" 2.100" 11⁄2" FNPT
BP-C20 1/2" 100 4.600" 2.375" 1.125" 1/2" FNPT
BP-C20-75 3/4" 50 psi 150 C-20 TFE 5.500" 3.500" 1.125" 3/4" FNPT
BP-C20-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
BP-PVC 1/2" 100 4.600" 2.375" 1.125" 1/2" FNPT
BP-PVC-75 3/4"
BP-PVC-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
50 psi
150
PVC TFE
5.500" 3.500" 1.125" 3/4" FNPT
BP-PVC-150 11⁄2" 800 9.000" 4.500" 2.100" 11⁄2" FNPT
RELIEF VALVES
.MAX.
150
MATERIALS
OF
CONSTRUC.
DIAPHRAGM
316SS TFE
EFG H
— — — — See Bulletin RV — — — —
5.500" 3.500" 1.125" 3/4" FNPT
MODEL
NUMBER PRESS. (GPH)
SIZE
SET FLOW
@ 50 PSI
RV-316 1/2" —
RV-316-75 3/4"
RV-316-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
150 psi
RV-316-150 11⁄2" 800 9.000" 4.500" 2.100" 11⁄2" FNPT
RV-KY 1/2" — 4.600" 2.375" 1.125" 1/2" FNPT
RV-KY-75 3/4"
RV-KY-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
150 psi
150
Kynar TFE
5.500" 3.500" 1.125" 3/4" FNPT
RV-KY-150 11⁄2" 800 9.000" 4.500" 2.100" 11⁄2" FNPT
RV-C20 1/2" —
— — — — See Bulletin RV — — — —
RV-C20-75 3/4" 150 psi 150 C-20 TFE 5.500" 3.500" 1.125" 3/4" FNPT
RV-C20-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
RV-PVC 1/2" — 4.600" 2.375" 1.125" 1/2" FNPT
RV-PVC-75 3/4"
RV-PVC-100 1" 250 5.800" 3.500" 1.250" 1" FNPT
150 psi
150
PVC TFE
5.500" 3.500" 1.125" 3/4" FNPT
RV-PVC-150 11⁄2" 800 9.000" 4.500" 2.100" 11⁄2" FNPT
Only one inlet provided on 1/2" PVC and Kynar Relief Valves
*
DIMENSIONS
REPAIR KITS
Each kit contains a replacement spring, diaphragm, threaded adjuster and support disk.
A
D
C
B
E
H
G
*
F
OUTLET
PART
NUMBER
DESCRIPTION
RK001 Fits all 1/2" “BP” back pressure valves above, all materials
RK002 Fits all 3/4" and 1" “BP” back pressure valves and “RV” relief valves above, all materials
RK003 Fits all 11⁄2" “BP” back pressure valves and “RV” relief valves above, all materials
SOLD BY:
P.O. Box 247 • Lansdale, PA 19446-0247
Tel: 215-699-8700 • Fax: 215-699-0370
Toll-Free Tel: 1- 888-3NEPTUNE (1- 888-363-7886)
Toll-Free Fax: 1- 800-255-4017
Web Site: http://www.neptune1.com
E-mail: pump@neptune1.com
© 2008 Neptune Chemical Pump Company All Rights Reserved Bulletin BP-08 P/N ZL107020 Printed in U.S.A.
Loading...