Suggestions

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

Multifunctional Valve Type MFV-DK, PVDF

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

  • Back pressure valve, opening pressure approx. 1.5 bar with free outlet or priming pressure at the suction end (black rotary dial)
  • Relief valve, opening pressure approx. 6, 10 or 16 bar (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.

Valve bodyPVDF
DiaphragmPTFE-coated
SealFKM and EPDM (loose)

Type

Relief opening pressure*

Connector size

Bypass connector

Order no.

* 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

16 bar

6-12

6 x 4

792011

Size I

10 bar

6-12

6 x 4

791715

Size I

6 bar

6-12

6 x 4

1005745

Size II

10 bar

6-12

12 x 9

792203

Size II

6 bar

6-12

12 x 9

740427

Size III

10 bar

DN 10

12 x 9

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

Back pressure valve type DHV-S-DK, 0-10 bar adjustable

Adjustable back pressure valve for fitting directly onto the dosing head to generate a constant back pressure. For accurate metering with a free outlet and with priming pressure on the suction side.

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

Applications:Metering pump alpha, Beta®, gamma/ X, gamma/XL, Pneumados b, EXtronic®

Type

adjustable pressure max.

Connector width

Material

Order no.

bar

DIN / ANSI

DHV-S-DK

10

6 to 12 mm

PP

302320

DHV-S-DK

10

6 to 12 mm

PC/FKM

302321

DHV-S-DK

10

6 to 12 mm

TT

302322

DHV-S-DK

10

6 mm

SS

1003793

DHV-S-DK

10

8 mm

SS

1003795

DHV-S-DK

10

12 mm

SS

1003797

* Caution: The product contains adhesive joints with Tangit. Please note the resistance of Tangit adhesive.

  • pk_1_129

Back pressure valve/relief valve type DHV-S-DL, 0-10 bar adjustable

Adjustable back pressure valve for installation in the metering line to generate a constant back pressure for precise metering with a free outlet and with priming pressure on the suction side

When used as a back pressure valve in long lines to avoid resonance vibrations: Install at the end of the metering line or select a set pressure greater than the line pressure loss

Use in conjunction with pulsation damper only with a free outlet and short metering line. Use type DHV-U when using a pulsation damper with back pressure or long lines.

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

Applications:Metering pumps alpha, Beta® , gamma/ X, gamma/XL, Pneumados b, EXtronic®

Type

adjustable pressure max.

Connector width

Material

Order no.

bar

DIN / ANSI

DHV-S-DL

10

6 to 12 mm

PP

302323

DHV-S-DL

10

6 to 12 mm

PC/FKM

302324

DHV-S-DL

10

6 to 12 mm

TT

302325

DHV-S-DL

10

6 mm

SS

302326

DHV-S-DL

10

8 mm

SS

302327

DHV-S-DL

10

12 mm

SS

302328

2 connector kits of the required hose size should be ordered as extras for the connection.

* Please note: The product contains connections bonded with Tangit. Always note the durability of Tangit adhesive.

Pipe Nipples

For the direct connection of the pressure maintenance valve DHV-S-DL in stainless steel (SS) to the liquid end.

Type

Dimension A

B dimension

Order no.

mm

mm

1.4571 pipe nipple

6

40

818537

1.4571 pipe nipple

8

40

818538

1.4571 pipe nipple

12

40

818539

  • pk_1_054
  • pk_1_017

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

More in the Download Centre

0 Results
Filter by document type
Application Example / Reference (0)
Brochure / Flyer (0)
Catalogue (0)
Certificate / Declaration (0)
Data Sheet (0)
Drawing / Dimensional Drawing / 3D (0)
Exploded View / Spare Parts (0)
Material Safety Data Sheet (0)
Operating Instructions (0)
Others (0)
Press Release (0)
Publication / Article (0)
Software (0)
Wiring Diagram (0)

Selected filters:

Matching downloads

Sort by A to Z
Load more matches ...
No more matches available!

Unfortunately, we did not find an appropriate match.

All words written correctly?
Search again with fewer or different search terms?

Please try again later

Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

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

Contact us

»Please send us your request! We will contact you shortly.«

+49 6221 842 0  Send request   

Matching Products

News and Events

1 2 3