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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.

Your benefits

  • Protects against overpressure
  • Priming aid
  • Relieves the discharge 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.

Multifunctional valve for assembly directly onto the liquid end of the pump with the following functions:

  • Back pressure valve, opening pressure approx. 1.5 bar, with open discharge or positive pressure on the suction side (black rotary knob)
  • Relief valve, opening pressure approx. 6, 10 or 16 bar (red rotary knob)
  • Priming aid with back pressure, no need to de-pressurise pipes
  • Pressure relief, e.g. prior to servicing

The ProMinent® multifunctional valve is simple to operate using smooth action rotary knobs, which return to their initial position on release. This ensures safe operation even under difficult access conditions. The ProMinent® multifunctional valve is made of PVDF and can be used with virtually all chemicals.

Warning: Back pressure valves are not intended as completely sealed units!

Caution: The bypass line must always be connected.

Valve bodyPVDF
DiaphragmPTFE- coated
SealFKM and EPDM (enclosed)
TypeRelief opening pressure*ConnectionBypass connectorOrder no.
Size I16 bar6-126 x 4792011
Size I10 bar6-126 x 4791715
Size I6 bar6-126 x 41005745
Size II10 bar6-1212 x 9792203
Size II6 bar6-1212 x 9740427
Size III10 barDN 1012 x 9792215
*The relief opening pressure given above is the pressure at which the valve begins to open. The pressure can be up to 50% higher until the valve is fully open depending on the type of pump.

Application: multifunctional valves

Size IALPc 1001, 1002, 1004, 1008, 0708
 Beta®, gamma/ L type 1000, 1601, 1602, 1604, 1605, 1005, 1008, 0708, 0413, 0220
 gamma/ X type 1602, 1604, 1009, 0708, 0414, 0220
 delta® type 1608, 1612
Size IIALPc 0417, 0230
 Beta®, gamma/ L type 1605, 1008, 0713, 0420, 0232
 gamma/ X type 1009, 0715, 0424, 0245
 delta® type 1020, 0730
Size IIIdelta® type 0450, 0280

For material design PP, PV, NP, TT

  • pk_1_053

PVC Right-Angled Threaded Connector

Right-angled threaded connector made of PVC for mounting a multifunctional valve on metering pumps with a self-bleeding dosing head.

To fit metering pumps with self-bleeding dosing head of the Beta® and gamma/ L product ranges.

MaterialFig.Order no.
PCE VersionPVC/EPDMpk_1_0831003472
PCB VersionPVC/FKMpk_1_0831003318

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

  • pk_1_083

Back Pressure Valve Type DHV-S-DK, 0-10 bar Adjustable

Adjustable back pressure valve for mounting directly on the dosing head

  • To generate constant back pressure
  • For accurate metering with a free outlet
  • 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!

TypeAdjustable pressureConnectionMaterialOrder no.
DIN / ANSI
DHV-S-DK0 – 10 bar6 to 12 mmPP/EPDM302320
DHV-S-DK0 – 10 bar6 to 12 mmPC/FKM*302321
DHV-S-DK0 – 10 bar6 to 12 mmTT/PTFE302322
DHV-S-DK0 – 10 bar6 mmSS1003793
DHV-S-DK0 – 10 bar8 mmSS1003795
DHV-S-DK0 – 10 bar12 mmSS1003797

* 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 mounting in the metering line

  • To generate constant back pressure
  • For accurate metering with a free outlet
  • 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 the back pressure valve / relief valve type DHV-U for use with 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!

TypeAdjustable pressureConnectionMaterialOrder no.
DIN / ANSI
DHV-S-DL0 – 10 bar6 to 12 mmPP302323
DHV-S-DL0 – 10 bar6 to 12 mmPC/FKM*302324
DHV-S-DL0 – 10 bar6 to 12 mmTT302325
DHV-S-DL0 – 10 bar6 mmSS302326
DHV-S-DL0 – 10 bar8 mmSS302327
DHV-S-DL0 – 10 bar12 mmSS302328
 Order 2 connecting kits in the required hose size separately for the connection.

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

  • pk_1_054
  • pk_1_017

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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.

Your benefits

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

Technical Data

Downloads

Contact us

Ralf Kiermaier

Vice President Sales and Marketing, ProMinent GmbH

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

+49 6221 842 0  Send request   

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