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Back Pressure Valves / Relief Valves for Motor-Driven 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 provide low-pulsation metering.

Product description

Accurately metered

Back pressure valves for motor-driven metering pumps 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

Back Pressure Valve / Relief Valve Type DHV 712-R

Plunger diaphragm valve with internal approach flow and no back pressure effect.

  • To generate constant back pressure
  • for precise pumping and to protect against over-metering where there is a free outlet or fluctuating back pressure or when metering into a vacuum.

Also used in conjunction with pulsation dampers to generate low-pulsation metering.

Please note: Back pressure valves cannot be used as absolutely leak-tight shut-off devices. It is essential that you observe the installation notes in the operating instructions. Take appropriate precautions when handling hazardous media.

Important: When used as a relief valve in conjunction with sticky media (e.g. lime milk), appropriate safety precautions should be taken (e.g. flushing after a response).

Adjustable pressure0.5 – 10 bar

Applications of PPE / PCB

20 °C - max. operating pressure 10 bar

Applications of PVT / TT / SS

30 °C - max. operating pressure 10 bar

TypeGNominal diameterOrder no.
TT3/4DN 101000059
TT1DN 151000060
TT1 1/4DN 201000061
TT1 1/2DN 251000062
TT2DN 321000063
TT2 1/4DN 401000064

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

Dimensions of DHV 712-R

DNGHLhDm
mmmmmm mm
32226020559** / 37***147M8
402 1/426020559** / 37***147M8

*= Approx. values;

** = PP, PVC, PVDF;

*** = TT, SS

Materials

TypeHousing/ConnectorsPlungersPlunger SealSeal/Connectors
TTPTFE with carbonPTFE2PTFE3PTFE3
2PTFE (white)
3Packing ring PTFE/FKM
  • pk_2_031

Back Pressure Valve / Relief Valve for High-Pressure Systems

For use as an adjustable safety relief valve and as a back pressure valve. Relief valve and corresponding spring must be ordered separately

Use as a pressure relief valve (adjustable) and as a back pressure valve. Overflow valve and corresponding spring must be ordered separately.

Material: stainless steel 316/FKM

Temperature range: -18 °C to 120 °C

Recommended Use up to 200 l/h

ConnectionOrder no.
Overflow valve1/4″ NPT inner and outer thread202505
Spring for pressure rangeSpring colourOrder no.
3.4 – 24 barblue202519
24.0 – 52 baryellow202520
52.0 – 103 barviolet202525
103.0 – 155 barorange202524
155.0 – 207 barbrown202523
207.0 – 276 barwhite202522
276.0 – 345 barred202521

Recommended Use up to 300 l/h

ConnectionOrder no.
Overflow valve1/2″ NPT inner and outer thread1005499
Spring for pressure rangeSpring colourOrder no.
3.4 – 24 barblue1005500
24.0 – 50 baryellow1005501
50.0 – 100 barviolet1005502

Reducing Pipe Nipple

ConnectionOrder no.
1/4" NPT internal – 1/4" NPT external (A)359378
1/4" NPT external – 1/4 Rp internal (B)359379
1/2" NPT internal – 1/2" NPT external (A)1005503
1/2" NPT external – 1/2 Rp internal (B)1005504
  • pk_2_032

Back Pressure Valve / Relief Valve Type DHV-U

Plunger diaphragm valve with internal approach flow and no back pressure effect.

  • To generate constant back pressure and
  • as a relief valve.

Can be installed at any location in the pipework system.

Please note: Back pressure valves cannot be used as absolutely leak-tight shut-off devices. It is essential that you observe the installation notes in the operating instructions. Take appropriate precautions when handling hazardous media.

Important: When used as a relief valve in conjunction with sticky media (e.g. lime milk), appropriate safety precautions should be taken (e.g. flushing after a response).

Adjustable pressure0.5 – 10 bar

Application of PPE/PPB/PCE/PCB:

20 °C - max. operating pressure 10 bar

Application of PVT/SST:

30 °C - max. operating pressure 10 bar

TypeNominal diameterGOrder no.
PPEDN 103/41037285
PPBDN 103/41038133
PCEDN 103/41038144
PCBDN 103/41037765
PVTDN 103/41037767
SSTDN 103/41043194
PPEDN 1511036816
PPBDN 1511038145
PCEDN 1511038146
PCBDN 1511037764
PVTDN 1511037766
SSTDN 1511043193
PPEDN 201 1/41037284
PPBDN 201 1/41038147
PCEDN 201 1/41038148
PCBDN 201 1/41037775
PVTDN 201 1/41037777
SSTDN 201 1/41043192
PPEDN 251 1/21036633
PPBDN 251 1/21038149
PCEDN 251 1/21038150
PCBDN 251 1/21037774
PVTDN 251 1/21037776
SSTDN 251 1/21043191
PPEDN 3221051517
PPBDN 3221051522
PCEDN 3221051514
PCBDN 3221051520
PVTDN 3221051503
SSTDN 3221051516
PPEDN 402 1/41051518
PPBDN 402 1/41051521
PCEDN 402 1/41051501
PCBDN 402 1/41051519
PVTDN 402 1/41051502
SSTDN 402 1/41051515

Materials

TypeHousing/ConnectorsPlungersPlunger SealSeal/Connectors
PPEPPPVDFEPDMEPDM
PPBPPPVDFFKMFKM
PCEPVCPVDFEPDMEPDM
PCBPVCPVDFFKMFKM
PVTPVDFPVDFPTFE*FKM
SST1.44041.4404PTFE*PTFE

* Cover ring made of PTFE/FKM

Dimensions of DHV-U (PP, PVC, PVDF design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182479M640
151144*1182479M840
201 1/4196*1503799M846
251 1/2196*1503799M646
32225220054139.5M865
402 1/425220054139.5M865
* Approximate values

Dimensions of DHV-U (SS version)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182079M640
151144*1182079M640
201 1/4196*1503099M646
251 1/2196*1503099M646
32225220037139.5M865
402 1/425220037139.5M865
* Approximate values
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Back Pressure Valve / Relief Valve Type DHV-U in physiologically safe design (FDA)

Back pressure valves for motor-driven metering pumps 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.

Adjustable pressure0.5 – 10 bar

Application of PPE/PPB/PCE/PCB

20 °C - max. operating pressure 10 bar

Application of PVT/SST

30 °C - max. operating pressure 10 bar

TypeNominal diameterGOrder no.
PPEDN 103/41076578
PVTDN 103/41076579
SSTDN 103/41076532
PPEDN 1511076580
PVTDN 1511076581
SSTDN 1511076531
PPEDN 201 1/41076582
PVTDN 201 1/41076583
SSTDN 201 1/41076597
PPEDN 251 1/21076585
PVTDN 251 1/21076586
SSTDN 251 1/21076584
PPEDN 3221076587
PVTDN 3221076588
SSTDN 3221076589
PPEDN 402 1/41076590
PVTDN 402 1/41076591
SSTDN 402 1/41076592

All wetted materials in the "Physiologically safe (FDA) in respect of wetted materials" design comply with the following FDA guidelines:

MaterialGuideline
PTFE21CFR177.1510
PVDF21CFR177.2510
PP21CFR177.1520
EPDM/FKM21CFR177.2600

Materials

TypeHousing/ConnectorsPlungersPlunger SealSeal/Connectors
PPEPPPVDFEPDMEPDM
PVTPVDFPVDFPTFE*FKM
SST1.44041.4404PTFE*PTFE

* Cover ring made of PTFE/FKM

Dimensions of DHV-U (FDA) (PP, PVC, PVDF design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182479M640
151144*1182479M640
201 1/4196*1503799M646
251 1/2196*1503799M646
322252*20054139.5M865
402 1/4252*20054139.5M865
* Approximate values

Dimensions of DHV-U (FDA) (SS design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182079M640
151144*1182079M640
201 1/4196*1503099M646
251 1/2196*1503099M646
322252*20037139.5M865
402 1/4252*20037139.5M865
* Approximate values
  • p_ac_0256_sw

Relief valve type DHV-UR

The universal relief valves type DHV-UR are, like all valves in the DHV-U product range, are continuously adjustable plunger diaphragm valves with an internal flow. In the event of impermissible overpressure, the internal plunger diaphragm opens the second output power, the bleeder output. Can be installed at any location in the pipework system. Very low pressure losses when the relief valve is closed owing to its virtually free pipe cross-section Simple spare parts management, the wear parts (pressure spring, diaphragms, plunger seal, connector set seal) correspond to the DHV-U valve product range.

Adjustable pressure0.5 – 10 bar

Application of PPE/PPB/PCE/PCB

20 °C - max. operating pressure 10 bar

Application of PVT/SST

30 °C - max. operating pressure 10 bar

TypeNominal diameterGOrder no.
PPEDN 103/41061337
PPBDN 103/41061341
PCEDN 103/41061339
PCBDN 103/41061343
PVTDN 103/41061365
SSTDN 103/41061550
PPEDN 1511061336
PPBDN 1511061340
PCEDN 1511061338
PCBDN 1511061342
PVTDN 1511061364
SSTDN 1511061551
PPEDN 201 1/41061367
PPBDN 201 1/41061371
PCEDN 201 1/41061369
PCBDN 201 1/41061373
PVTDN 201 1/41061375
SSTDN 201 1/41061569
PPEDN 251 1/21061366
PPBDN 251 1/21061370
PCEDN 251 1/21061368
PCBDN 251 1/21061372
PVTDN 251 1/21061374
SSTDN 251 1/21061570

Materials used

TypeHousing/ConnectorsPlungersPlunger SealSeal/Connectors
PPEPPPVDFEPDMEPDM
PPBPPPVDFFKMFKM
PCEPVCPVDFEPDMEPDM
PCBPVCPVDFFKMFKM
PVTPVDFPVDFPTFE*FKM
SST1.44041.4404PTFE*PTFE

* Cover ring made of PTFE/FKM

Dimensions of DHV-UR (PP, PVC, PVDF design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182479M635
151144*1182479M635
201 1/4196*1503799M646
251 1/2196*1503799M646
* Approximate values

Dimensions of DHV-UR (SS design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182079M635
151144*1182079M635
201 1/4196*1503099M646
251 1/2196*1503099M646
* Approximate values
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1 2

Relief valve type DHV-UR, FDA design

Back pressure valves for motor-driven metering pumps 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.

Adjustable pressure0.5 – 10 bar

Application of PPE/PPB/PCE/PCB

20 °C - max. operating pressure 10 bar

Application of PVT/SST

30 °C - max. operating pressure 10 bar

TypeNominal diameterGOrder no.
PPEDN 103/41075828
PVTDN 103/41075830
SSTDN 103/41075847
PPEDN 1511075827
PVTDN 1511075829
SSTDN 1511075846
PPEDN 201 1/41075833
PVTDN 201 1/41075845
SSTDN 201 1/41075849
PPEDN 251 1/21075832
PVTDN 251 1/21075844
SSTDN 251 1/21075848

All wetted materials in the "Physiologically safe (FDA) in respect of wetted materials" design comply with the following FDA guidelines:

MaterialGuideline
PTFE21CFR177.1510
PVDF21CFR177.2510
PP21CFR177.1520
EPDM/FKM21CFR177.2600

Materials used

TypeHousing/ConnectorsPlungersPlunger SealSeal/Connectors
PPEPPPVDFEPDMEPDM
PVTPVDFPVDFPTFE*FKM
SST1.44041.4404PTFE*PTFE

* Cover ring made of PTFE/FKM

Dimensions of DHV-UR (FDA) (PP, PVC, PVDF design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182479M635
151144*1182479M635
201 1/4196*1503799M646
251 1/2196*1503799M646
* Approximate values

Dimensions of DHV-UR (FDA) (SS design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182079M635
151144*1182079M635
201 1/4196*1503099M646
251 1/2196*1503099M646
* Approximate values
  • p_ac_0267
  • p_ac_0268_v3
  • p_ac_0267_v2
  • p_ac_0268_v2

Relief valve type DHV-UR M configured for manometer

The relief valves DHV-UR with M designs are configured with a plug for manometer installation. Manometer with threaded socket G 1/4“ (ISO 228) can be fitted by the customer directly to the relief valve via the additional housing opening. Standard manometers with part number are available for neutral media. This also enables savings in terms of installation.

Adjustable pressure0.5 – 10 bar

Application of PPE/PPB/PCE/PCB:

20 °C - max. operating pressure 10 bar

Application of PVT/SST:

30 °C - max. operating pressure 10 bar

TypeNominal diameterGOrder no.
PPEDN 103/41077221
PPBDN 103/41077259
PCEDN 103/41077255
PCBDN 103/41077263
PVTDN 103/41077267
PPEDN 1511077220
PPBDN 1511077258
PCEDN 1511077254
PCBDN 1511077262
PVTDN 1511077266
PPEDN 201 1/41077219
PPBDN 201 1/41077257
PCEDN 201 1/41077223
PCBDN 201 1/41077261
PVTDN 201 1/41077265
PPEDN 251 1/21077218
PPBDN 251 1/21077256
PCEDN 251 1/21077222
PCBDN 251 1/21077260
PVTDN 251 1/21077264

Materials used

TypeHousing/ConnectorsPlungersPlunger SealSeal/Connectors
PPEPPPVDFEPDMEPDM
PPBPPPVDFFKMFKM
PCEPVCPVDFEPDMEPDM
PCBPVCPVDFFKMFKM
PVTPVDFPVDFPTFE*FKM

* Cover ring made of PTFE/FKM

Dimensions of DHV-UR M (PP, PVC, PVDF design)

DNGHLhDmB
mm mm mm mm mm
103/4144*1182479M635
151144*1182479M635
201 1/4196*1503799M646
251 1/2196*1503799M646
* Approximate values
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  • p_ac_0271_v2

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Overview

Accurately metered

Back pressure valves for motor-driven metering pumps 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

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Ralf Kiermaier

Vice President Sales and Marketing, ProMinent GmbH

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

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