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Back Pressure Valves/Relief Valves for Low-Pressure Metering Pumps

Back pressure valves are used to generate a constant back pressure and achieve precise metering in systems with a free outlet. They are also used in conjunction with pulsation dampers to generate low-pulsation metering.

Product description

Accurately metered

Back pressure valves are designed for different applications. Please refer to the relevant notes for the different designs.

Relief valves are used in the bypass to protect pumps, pipes and fittings from overpressure in the event of incorrect operation or blockages. In the event of a malfunction, the pump pumps back into the storage tank.

The benefits for you

  • Protects against overpressure
  • Priming aid
  • Relieves the pressure line
  • Increases dosing precision

Backpressure, antisiphon and pressure relief valves

Backpressure (2-port) valves may be used in-line to provide a constant discharge pressure for protection from siphoning, or they may be teed off of the discharge line for pressure relief, discharging back to the source tank or to the pump suction line to create a bypass.

Pressure relief (3-port) valves are mounted in the discharge line, featuring a separate relief port which discharges back to the source tank or to the pump suction line to create a bypass.

Backpressure valves provide several functions: they improve repeatability by providing a constant discharge pressure; they provide antisiphon protection for discharge into pressurized water lines or vacuums, or where suction head exceeds discharge head; and they minimize pulsation when used in conjunction with a pulsation dampener.

In-line backpressure/antisiphon and pressure relief valves

These adjustable backpressure (2-port) and pressure relief (3-port) valves have FNPT ports and require tubing adapters for use with flexible tubing.

Can be adjusted with screwdriver.

  • us_pc_4_013
    us_pc_4_013
  • us_pc_4_014
    us_pc_4_014
  • us_pc_4_015
    us_pc_4_015

Dimensions in inches (mm)

ABCDE
2.6 (65)1/4 NPT1.2 (31)4.9 (125)6.2 (158)
2.6 (65)1/2 NPT1.2 (31)4.9 (125)6.2 (158)
3.5 (88)3/4 NPT1.1 (28)5.4 (136)6.7 (169)
3.9 (98)1 NPT1.4 (36)5.7 (145)7.0 (178)
4.6 (118 )1-1/2 NPT2.2 (56)9.0 (229.5 )10.3 (260.5)
4.6 (118 )2 NPT2.2 (56)9.0 (229.5 )10.3 (260.5)

  • us_pc_4_001
    us_pc_4_001

Multifunction Valve

Back pressure valve/relief valve for fitting directly on the pump's dosing head with the functions:

  • Back pressure valve, opening pressure approx. 21.75 psi with free outlet or priming pressure at the suction end (black rotary dial)
  • Relief valve, opening pressure approx. 87, 145 or 232 psi (red rotary dial)
  • Priming aid for pending back pressure, no need to release discharge line
  • Discharge line relief, e.g. prior to service work

The multifunctional valve is operated by free-moving rotary dials that automatically return to their original position when released by the operator. This means operation is possible even when access is difficult. The multifunctional valve is made of PVDF and can be used to meter almost any chemical.

Caution: Back pressure valves are not absolutely leak-tight shut-off devices! It is essential that you observe the installation notes in the operating instructions!

Caution: The bypass line should always be connected.

Materials in Contact with the Medium

Valve bodyPVDF
DiaphragmPTFE-coated
SealFKM and EPDM (loose)
 

Type

Relief opening pressure*

Connector size

Bypass connector

Dim. B

Dim. H

Order no.

inch

inch

* The relief opening pressure given above is the pressure at which the valve starts to open. The pressure may be up to 50% more than this before the valve is fully open depending on the type of pump.

Size I

232 psi

6-12

6 x 4

4.65

3.5

792011

Size I

145 psi

6-12

6 x 4

4.65

3.5

791715

Size I

87 psi

6-12

6 x 4

4.65

3.5

1005745

Size II

145 psi

6-12

12 x 9

5.43

3.78

792203

Size II

87 psi

6-12

12 x 9

5.43

3.78

740427

Size III

145 psi

DN 10

12 x 9

5.43

4.72

792215

 Application: multifunctional valves
Size IALPc 1001, 1002, 1004, 1008, 0708
 beta, type 1000, 1601, 1602, 1604, 1605, 1005, 1008, 0708, 0413, 0220
 gamma/ X type 1602, 1604, 1009, 0708, 0414, 0220
 gamma/ XL type 1608, 1612
Size IIALPc 0417, 0230
 beta, type 1605, 1008, 0713, 0420, 0232
 gamma/ X type 1009, 0715, 0424, 0245
 gamma/XL type 1020, 0730
Size IIIgamma/ XL type 0450, 0280

For material version PP, PV, NP, TT

  • pk_1_053
    pk_1_053
  • us_pc_4_007
    us_pc_4_007

Pressure Relief Valves

1/4" FNPT Backpressure Valves (2-port)

 

Order no.

PP

1009444

PVC

1009445

PVDF

1009446

316 SS

1009447

1/4" FNPT Backpressure Valves (3-port)

 

Order no.

PP

1009452

PVC

1009453

PVDF

1009454

316 SS

1009455

Tubing Adapters

(1 required per valve port): 1/4" x 3/16" tubing x 1/4" MNPT

 

Order no.

PP/EPDM

7500060

PP/Viton®

7500058

PVC/EPDM

7500064

PVC/Viton®

7500062

1/2" FNPT Backpressure Valves (2-port)

 

Order no.

PP

1006846

PVC

1006850

PVDF

1006854

316 SS

1008796

1/2" FNPT Backpressure Valves (3-port)

 

Order no.

PP

1006858

PVC

1006862

PVDF

1006866

316 SS

1008800

Tubing Adapters

(1 required per valve port): 1/2" x 3/8" tubing x 1/2" MNPT

 

Order no.

PP/EPDM

7500061

PP/Viton®

7500059

PVC/EPDM

7500065

PVC/Viton®

7500063

3/4" FNPT Backpressure Valves (2-port)

 

Order no.

PP

1006847

PVC

1006851

PVDF

1006855

316 SS

1008797

3/4" FNPT Backpressure Valves (3-port)

 

Order no.

PP

1006859

PVC

1006863

PVDF

1006867

316 SS

1008801

1" FNPT Backpressure Valves (2-port)

 

Order no.

PP

1006848

PVC

1006852

PVDF

1006856

316 SS

1008798

1" FNPT Backpressure Valves (3-port)

 

Order no.

PP

1006860

PVC

1006864

PVDF

1006868

316 SS

1008802

1-1/2" FNPT Backpressure Valves (2-port)

 

Order no.

PP

1006849

PVC

1006853

PVDF

1006857

316 SS

7302243

1-1/2" FNPT Backpressure Valves (3-port)

 

Order no.

PP

1006861

PVC

1006865

PVDF

1006869

316 SS

7302261

2" FNPT Backpressure Valves (2-port)

 

Order no.

PP

1009448

PVC

1009449

PVDF

1009450

316 SS

7302247

2" FNPT Backpressure Valves (3-port)

 

Order no.

PP

1009456

PVC

1009457

PVDF

1009458

316 SS

7302265

Spare Parts Sets

Contains 1 of each: compression spring, diaphragm, spring plate, and pressure adj. disc.

 

Order no.

SPK 1/4" - 1/2"

1035446

SPK 3/4" - 1"

1035447

SPK 1-1/2” - 2"

1035448

Spare Diaphragms

 

Order no.

1/4" - 1/2" valve PTFE/EPDM

1006813

3/4" - 1" valve PTFE/EPDM

1006814

1-1/2” - 2" valve PTFE/EPDM

1006815

High pressure relief valve, adjustable, 1/4" and 1/2" NPT for Sigma X, Makro HK and ProMus pumps

Can also be used as a backpressure valve for < 30 gph (113 l/h).These valves are without springs, which must be ordered separately.

Connector size

Order no.

Stainless steel/Viton®

1/4" NPT male and female thread

7202505

Stainless steel/EPDM

1/4" NPT male and female thread

7744507

Spring counter pressure min.

Spring counter pressure max.

Spring colour

Order no.

psi

psi

49

348

blue

7202519

348

754

yellow

7202520

754

1,494

violet

7202525

1,494

2,248

orange

7202524

2,248

3,002

brown

7202523

3,002

4,003

white

7202522

4,003

5,004

red

7202521

Connector size

Order no.

Stainless steel/Viton®

1/2" NPT male and female thread

7744508

Stainless steel/EPDM

1/2" NPT male and female thread

7744509

Spring counter pressure min.

Spring counter pressure max.

Spring colour

Order no.

psi

psi

49

348

blue

7744510

348

725

yellow

7744511

725

1,450

violet

7744512

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Overview

Accurately metered

Back pressure valves are designed for different applications. Please refer to the relevant notes for the different designs.

Relief valves are used in the bypass to protect pumps, pipes and fittings from overpressure in the event of incorrect operation or blockages. In the event of a malfunction, the pump pumps back into the storage tank.

The benefits for you

  • Protects against overpressure
  • Priming aid
  • Relieves the pressure line
  • Increases dosing precision

Technical Data

Downloads

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ProMinent Fluid Controls, Inc.


sales-us@prominent.com

+1 412-787-2484   
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