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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.

The benefits for you

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

Back Pressure Valve / Relief Valve Type DHV-U

Universal back pressure valves of the DHV-U product range are back pressure-free piston diaphragm valves with an internal flow. They are used to generate a constant back pressure and also as relief valves. They can be installed at any location in the pipework system.

Back pressure valves are used to generate a constant back pressure for precise pumping and to protect against over-metering where there is a free outlet, fluctuating back pressure or priming pressure on the suction side. They are also used in conjunction with pulsation dampers to generate low-pulsation metering.

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

Important: Back pressure valves cannot be used as absolutely leak-tight shut-off devices. Take appropriate safety precautions when handling hazardous media. Relief valves are not safety valves by their definition as per DIN EN ISO 4126-1.

Important: Take appropriate safety measures (e.g. flushing after possible response) when using as relief valves in conjunction with viscous media (e.g. lime milk).

Adjustable pressure    0.5 - 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

Version

Nominal diameter

Dimension G

Order no.

PPB

DN 10

3/4

1038133

PPE

DN 10

3/4

1037285

PCB Version

DN 10

3/4

1037765

PVT

DN 10

3/4

1037767

PCE

DN 10

3/4

1038144

SST

DN 10

3/4

1043194

PPB

DN 15

1

1038145

PPE

DN 15

1

1036816

PCB

DN 15

1

1037764

PVT

DN 15

1

1037766

PCE

DN 15

1

1038146

SST

DN 15

1

1043193

PPB

DN 20

1 1/4

1038147

PPE

DN 20

1 1/4

1037284

PCB

DN 20

1 1/4

1037775

PVT

DN 20

1 1/4

1037777

PCE

DN 20

1 1/4

1038148

SST

DN 20

1 1/4

1043192

PPB

DN 25

1 1/2

1038149

PPE

DN 25

1 1/2

1036633

PCB

DN 25

1 1/2

1037774

PVT

DN 25

1 1/2

1037776

PCE

DN 25

1 1/2

1038150

SST

DN 25

1 1/2

1043191

PPE

DN 32

2

1051517

PVT

DN 32

2

1051503

PCE

DN 32

2

1051514

SST

DN 32

2

1051516

PCB

DN 32

2

1051520

PPB

DN 32

2

1051522

PPE

DN 40

2 1/4

1051518

PCE

DN 40

2 1/4

1051501

PVT

DN 40

2 1/4

1051502

SST

DN 40

2 1/4

1051515

PCB

DN 40

2 1/4

1051519

PPB

DN 40

2 1/4

1051521

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

* Cover ring made from PTFE/FKM

PPE

PP

PVDF

EPDM

EPDM

PPB

PP

PVDF

FKM

FKM

PCE

PVC

PVDF

EPDM

EPDM

PCB

PVC

PVDF

FKM

FKM

PVT

PVDF

PVDF

PTFE *

FKM

SST

1.4404

PTFE

PTFE *

PTFE

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

DN

G

H

L

h

D

m

B

mm

mm

mm

mm

mm

10

3/4

144

118

24

79

M6

40

15

1

144

118

24

79

M8

40

20

1 1/4

196

150

37

99

M8

46

25

1 1/2

196

150

37

99

M6

46

32

2

252

200

54

139.5

M8

65

40

2 1/4

252

200

54

139.5

M8

65

Dimensions of DHV-U (SS version)

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

20

79

M6

40

15

1

144

118

20

79

M6

40

20

1 1/4

196

150

30

99

M6

46

25

1 1/2

196

150

30

99

M6

46

32

2

252

200

37

139.5

M8

65

40

2 1/4

252

200

37

139.5

M8

65

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  • p_moz_0005_sw

Back pressure valve/relief valve type DHV-U M configured for a manometer

The relief valves DHV-U M are configured with a plug for manometer installation.

Manometers 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 pressure    0.5 - 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

Version

Nominal diameter

Dimension G

Order no.

PPB

DN 10

3/4

1077878

PPE

DN 10

3/4

1077866

PCE

DN 10

3/4

1077872

PCB

DN 10

3/4

1077884

PVT

DN 10

3/4

1077890

PPB

DN 15

1

1077877

PPE

DN 15

1

1077865

PCE

DN 15

1

1077871

PCB

DN 15

1

1077883

PVT

DN 15

1

1077889

PPB

DN 20

1 1/4

1077876

PPE

DN 20

1 1/4

1077864

PCE

DN 20

1 1/4

1077870

PCB

DN 20

1 1/4

1077882

PVT

DN 20

1 1/4

1077888

PPB

DN 25

1 1/2

1077875

PPE

DN 25

1 1/2

1077863

PCE

DN 25

1 1/2

1077869

PCB

DN 25

1 1/2

1077881

PVT

DN 25

1 1/2

1077887

PPB

DN 32

2

1077874

PPE

DN 32

2

1077862

PCE

DN 32

2

1077868

PCB

DN 32

2

1077880

PVT

DN 32

2

1077886

PPB

DN 40

2 1/4

1077873

PPE

DN 40

2 1/4

1077861

PCE

DN 40

2 1/4

1077867

PCB

DN 40

2 1/4

1077879

PVT

DN 40

2 1/4

1077885

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

* Cover ring made from PTFE/FKM

PPE

PP

PVDF

EPDM

EPDM

PPB

PP

PVDF

FKM

FKM

PCE

PVC

PVDF

EPDM

EPDM

PCB

PVC

PVDF

FKM

FKM

PVT

PVDF

PVDF

PTFE *

FKM

FDA design (21CFR177...)

We are happy to supply physiologically harmless (FDA) material designs of wetted materials for PPE, PVT and SST.

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

40

15

1

144

118

24

79

M8

40

20

1 1/4

196

150

37

99

M8

46

25

1 1/2

196

150

37

99

M6

46

32

2

252

200

54

139.5

M8

65

40

2 1/4

252

200

54

139.5

M8

65

Approximate values

Dimensions of DHV-U M (SS design)

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

40

15

1

144

118

24

79

M8

40

20

1 1/4

196

150

37

99

M8

46

25

1 1/2

196

150

37

99

M6

46

32

2

252

200

54

139.5

M8

65

40

2 1/4

252

200

54

139.5

M8

65

Pipe spring manometer

Pipe spring manometers in accordance with DIN EN 837-1 for neutral media for use with relief valves DHV-UR design M. When ordered, the manometer is supplied with the relief valve.

Nominal width63 mm
Display range0 - 16 bar
Housing material1.4571
Connector materialBrass
ConnectorThreaded assembly G 1/4" (ISO 228)
Connector positionRadial at bottom
Filling liquidGlycerol

Order no.

Pipe spring manometer

792726

  • p_ac_0256_m
  • p_moz_0005_sw

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 pressure    0.5 - 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

Version

Nominal diameter

Dimension G

Order no.

PPE

DN 10

3/4

1076578

SST

DN 10

3/4

1076532

PVT

DN 10

3/4

1076579

PPE

DN 15

1

1076580

SST

DN 15

1

1076531

PVT

DN 15

1

1076581

PVT

DN 20

1 1/4

1076583

PPE

DN 20

1 1/4

1076582

SST

DN 20

1 1/4

1076597

PPE

DN 25

1 1/2

1076585

SST

DN 25

1 1/2

1076584

PVT

DN 25

1 1/2

1076586

PVT

DN 32

2

1076588

PPE

DN 32

2

1076587

SST

DN 32

2

1076589

PPE

DN 40

2 1/4

1076590

PVT

DN 40

2 1/4

1076591

SST

DN 40

2 1/4

1076592

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

* Cover ring made from PTFE/FKM

PPE

PP

PVDF

EPDM

EPDM

PVT

PVDF

PVDF

PTFE *

FKM

SST

1.4404

PTFE

PTFE *

PTFE

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

We are happy to supply back pressure valves and relief valves DHV-U/DHV-UR in stainless steel and wetted EC 1935/2004 on request.

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

40

15

1

144

118

24

79

M8

40

20

1 1/4

196

150

37

99

M8

46

25

1 1/2

196

150

37

99

M6

46

32

2

252

200

54

139.5

M8

65

40

2 1/4

252

200

54

139.5

M8

65

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

20

79

M6

40

15

1

144

118

20

79

M6

40

20

1 1/4

196

150

30

99

M6

46

25

1 1/2

196

150

30

99

M6

46

32

2

252

200

37

139.5

M8

65

40

2 1/4

252

200

37

139.5

M8

65

  • p_ac_0256_m
  • p_moz_0005_sw

Relief valve type DHV-UR

The universal relief valves type DHV-UR, like all valves of the DHV-U product range, are infinitely adjustable piston diaphragm valves with internal flow. In the event of impermissible overpressure, the internal piston diaphragm opens the second outlet line, the relief outlet. It can be installed at any location in the pipework system. Very low pressure losses with a closed relief valve due to virtually free pipe cross-section Simple spare parts management, the wear parts (pressure spring, diaphragms, plunger seal, seal connection set) correspond to the DHV-U range of valves.

The benefits of the new relief valves DHV-UR include simpler assembly due to the saving of installation material/connection parts etc. and a reduction of adhesion points. The new installation method permits a slimmer design of metering stations.

Relief valves for fitting directly into the discharge line of the motor-driven metering pump with the functions:

  • Installation at any location in the pipework system.
  • Very low pressure losses with a closed relief valve due to virtually free pipe cross-section

Adjustable pressure

0.5 – 10 bar

Application of PP and PVC (PPE/PPB/PCE/PCB)

20 °C - maximum operating pressure 10 bar

Application of PVDF and stainless steel (PVT/SST)

30 °C - maximum operating pressure 10 bar

The benefits for you:

  • Simpler installation due to saving of installation material/connecting parts
  • Reduced adhesion points.
  • Slimmer construction type of metering stations.
  • Simple spare parts management, wear parts conform to the DHV-U valve product range.

Version

Nominal diameter

Dimension G

Order no.

PVT

DN 10

3/4

1061365

PPE

DN 10

3/4

1061337

PCE

DN 10

3/4

1061339

PPB

DN 10

3/4

1061341

PCB

DN 10

3/4

1061343

SST

DN 10

3/4

1061550

PCB

DN 15

1

1061342

PPE

DN 15

1

1061336

PCE

DN 15

1

1061338

PPB

DN 15

1

1061340

PVT

DN 15

1

1061364

SST

DN 15

1

1061551

PCE

DN 20

1 1/4

1061369

PPE

DN 20

1 1/4

1061367

PPB

DN 20

1 1/4

1061371

PCB

DN 20

1 1/4

1061373

PVT

DN 20

1 1/4

1061375

SST

DN 20

1 1/4

1061569

PCE

DN 25

1 1/2

1061368

PPE

DN 25

1 1/2

1061366

PPB

DN 25

1 1/2

1061370

PCB

DN 25

1 1/2

1061372

PVT

DN 25

1 1/2

1061374

SST

DN 25

1 1/2

1061570

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

* Cover ring made from PTFE/FKM

PPE

PP

PVDF

EPDM

EPDM

PPB

PP

PVDF

FKM

FKM

PCE

PVC

PVDF

EPDM

EPDM

PCB

PVC

PVDF

FKM

FKM

PVT

PVDF

PVDF

PTFE *

FKM

SST

1.4404

1.4404

PTFE *

PTFE

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

35

15

1

144

118

24

79

M6

35

20

1 1/4

196

150

37

99

M6

46

25

1 1/2

196

150

37

99

M6

46

Dimensions of DHV-UR (SS design)

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

35

15

1

144

118

24

79

M6

35

20

1 1/4

196

150

37

99

M6

46

25

1 1/2

196

150

37

99

M6

46

  • p_ac_0267_v2
  • p_ac_0268_v2

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 pressure    0.5 - 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

Version

Nominal diameter

Dimension G

Order no.

PVT

DN 10

3/4

1075830

PPE

DN 10

3/4

1075828

SST

DN 10

3/4

1075847

PVT

DN 15

1

1075829

PPE

DN 15

1

1075827

SST

DN 15

1

1075846

PPE

DN 20

1 1/4

1075833

PVT

DN 20

1 1/4

1075845

SST

DN 20

1 1/4

1075849

PVT

DN 25

1 1/2

1075844

PPE

DN 25

1 1/2

1075832

SST

DN 25

1 1/2

1075848

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

* Cover ring made from PTFE/FKM

PPE

PP

PVDF

EPDM

EPDM

PVT

PVDF

PVDF

PTFE *

FKM

SST

1.4404

PTFE

PTFE *

PTFE

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

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

35

15

1

144

118

24

79

M6

35

20

1 1/4

196

150

37

99

M6

46

25

1 1/2

196

150

37

99

M6

46

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

35

15

1

144

118

24

79

M6

35

20

1 1/4

196

150

37

99

M6

46

25

1 1/2

196

150

37

99

M6

46

We are happy to supply back pressure valves and relief valves DHV-U/DHV-UR in stainless steel and wetted EC 1935/2004 on request.

  • 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 pressure    0.5 - 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

Version

Nominal diameter

Dimension G

Order no.

PPE

DN 10

3/4

1077221

PPB

DN 10

3/4

1077259

PCE

DN 10

3/4

1077255

PVT

DN 10

3/4

1077267

PCB

DN 10

3/4

1077263

PPE

DN 15

1

1077220

PPB

DN 15

1

1077258

PCE

DN 15

1

1077254

PCB

DN 15

1

1077262

PVT

DN 15

1

1077266

PPE

DN 20

1 1/4

1077219

PCE

DN 20

1 1/4

1077223

PCB

DN 20

1 1/4

1077261

PVT

DN 20

1 1/4

1077265

PPB

DN 20

1 1/4

1077257

PPE

DN 25

1 1/2

1077218

PPB

DN 25

1 1/2

1077256

PCE

DN 25

1 1/2

1077222

PCB

DN 25

1 1/2

1077260

PVT

DN 25

1 1/2

1077264

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

* Cover ring made from PTFE/FKM

PPE

PP

PVDF

EPDM

EPDM

PPB

PP

PVDF

FKM

FKM

PCE

PVC

PVDF

EPDM

EPDM

PVT

PVDF

PVDF

PTFE *

FKM

PCB

PVC

PVDF

FKM

FKM

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

DN

G

H*

L

h

D

m

B

mm

mm

mm

mm

mm

* Approximate values

10

3/4

144

118

24

79

M6

35

15

1

144

118

24

79

M6

35

20

1 1/4

196

150

37

99

M6

46

25

1 1/2

196

150

37

99

M6

46

Pipe spring manometer

Pipe spring manometers in accordance with DIN EN 837-1 for neutral media for use with relief valves DHV-UR design M. When ordered, the manometer is supplied with the relief valve.

Nominal width63 mm
Display range0 - 16 bar
Housing material1.4571
Connector materialBrass
ConnectorThreaded assembly G 1/4" (ISO 228)
Connector positionRadial at bottom
Filling liquidGlycerol

Order no.

Pipe spring manometer

792726

  • p_ac_0267_v2

Back Pressure Valve / Relief Valve Type DHV 712-R

Adjustable pressure    0.5 - 10 bar

Application of PPE/PCB

20 °C - max. operating pressure 10 bar

Application of PVT/TT/SS

30 °C - max. operating pressure 10 bar

Version

Nominal diameter

Dimension G

Order no.

TT

DN 10

3/4

1000059

TT

DN 15

1

1000060

TT

DN 20

1 1/4

1000061

TT

DN 25

1 1/2

1000062

TT

DN 32

2

1000063

TT

DN 40

2 1/4

1000064

Please note: All vacuum cylinders with EPDM seal material are glued with Tangit. It is essential that the durability of Tangit adhesive is observed. All vacuum cylinders with FKM seal material are glued with DTX.

Dimensions of DHV 712-R

DN

G

H

L

h

D

m

mm

mm

mm

mm

10

3/4

173

120

-

81

M6

15

1

173

120

-

81

M6

20

1 1/4

201

150

-

107

M6

25

1 1/2

201

150

-

107

M6

32

2

260

205

59 / 37

147

M8

40

2 1/4

260

205

59 / 37

147

M8

Materials used

Version

Housing/Connectors

Plungers

Plunger Seal

Seal/Connectors

TT

Carbon-filled PTFE

PTFE

PTFE

PTFE

  • pk_2_031

Back Pressure Valve / Relief Valve for High-Pressure Systems

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

Connector size

Order no.

Overflow valve

1/4″ NPT inner and outer thread

202505

Spring counter pressure min.

Spring counter pressure max.

Spring colour

Order no.

3.4

24

blue

202519

24.0

52

yellow

202520

52.0

103

violet

202525

103.0

155

orange

202524

155.0

207

brown

202523

207.0

276

white

202522

276.0

345

red

202521

Recommended use up to 300 l/h

Connector size

Order no.

Overflow valve

1/2″ NPT inner and outer thread

1005499

Spring counter pressure min.

Spring counter pressure max.

Spring colour

Order no.

3.4

24

blue

1005500

24.0

50

yellow

1005501

50.0

100

violet

1005502

Reducing pipe nipple

Connector size

Order 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

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

  • pk_2_032

Downloads for Back Pressure Valves / Relief Valves for Motor-Driven Metering Pumps

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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.

The benefits for you

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

Technical Data

Downloads

Contact us

Wesley Sutton

Managing Director, ProMinent Fluid Controls UK Ltd.

»We are always available to help. Don't hesitate to contact us.«

+44 1530 560 555  Send request   

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