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Pressure Retaining Valve made of PVDF - back pressure safe

Product specification Resistant to corrosion and weather High impact toughness even at low... more

Product specification

Resistant to corrosion and weather

High impact toughness even at low temperatures

High mechanical stability

High chemical resistance

Technical specification

Material:

Lower valve body: PVDF (polyvinylidene fluoride), yellowish-white

Upper valve body: PP (polypropylene), glass fibre-reinforced, orange (RAL 2005)

Piston: PVDF (polyvinylidene fluoride)

Separation disc: PVDF (polyvinylidene fluoride)

Diaphragm: EPDM (ethylene-propylene-diene rubber), on media side PTFE-coated (polytetrafluoroethylene)

Valve seat seal: EPDM (ethylene-propylene-diene rubber); FPM (fluorinated rubber)

O-ring sealings of union ends: EPDM and FPM resp.

Connecting screws: stainless steel 1.4301 (V2A)

Media: technically pure, neutral and aggressive liquids provided that the selected valve materials are resistant at working temperature

Max. temperature: +100 °C

Max. operating pressure: 10 bar at +20 °C

Pressure setting range: 0.3 - 10 bar

Pressure settings: in 0.5 bar steps, between 0.5 and 10 bar

Release pressure: approx. 0.5 bar

Hysteresis: approx. 0.3 bar

Mounting position: optional

Connection: butt fusion spigot or socket fusion spigot or screw joint with welded socket

General Information In process plants for maintenance of working- or system-induced counter... more

General Information

In process plants for maintenance of working- or system-induced counter pressures as well as for reduction of pressure pulsation. The special diaphragm design and the interaction of diaphragm surface, valve piston and valve seat keep the working pressure at occurring counter pressure almost constant.

As pressurizing valve in metering pumps for guarantee of metering accuracy. In case of counter pressure at the secondary side the preliminary pressure and thus the metering quantity remain constant.

In all working areas where constant pressure is required.

Operating principle:

Does the working pressure or inlet pressure rise above a certain preset pressure value, the pressurized valve piston is lifted against the spring force. The valve opens and a pressure relief on the outlet side takes place. It closes as soon as the working pressure at the valve piston drops below preset spring force. If a system determined counter pressure arises at the secondary side this pressure has an impact on both simultaneously, namely under the diaphram and on the valve piston, i.e. the forces cancel out each other because the diaphragm and the valve mating surface / effective surface are the same size. The valve force and thus the working pressure remain nearly constant.

Item Image NW
mm
Connection Material gasket Unit
piece
Price
Euro*
Buy
350839
10 Schweißstutzen (Stumpf/Muffe) 16 mm EPDM 1 672.00
350840
15 Schweißstutzen (Stumpf/Muffe) 20 mm EPDM 1 672.00
350841
20 Schweißstutzen (Stumpf/Muffe) 25 mm EPDM 1 1,010.00
350842
25 Schweißstutzen (Stumpf/Muffe) 32 mm EPDM 1 1,010.00
350843
32 Schweißstutzen (Stumpf/Muffe) 40 mm EPDM 1 1,590.00
350844
40 Schweißstutzen (Stumpf/Muffe) 50 mm EPDM 1 1,590.00
350845
50 Schweißstutzen (Stumpf/Muffe) 63 mm EPDM 1 1,590.00
350846
10 Verschraubung mit Schweißmuffe 16 mm EPDM 1 708.00
350847
15 Verschraubung mit Schweißmuffe 20 mm EPDM 1 708.00
350848
20 Verschraubung mit Schweißmuffe 25 mm EPDM 1 1,060.00
350849
25 Verschraubung mit Schweißmuffe 32 mm EPDM 1 1,080.00
350850
32 Verschraubung mit Schweißmuffe 40 mm EPDM 1 1,646.00
350851
40 Verschraubung mit Schweißmuffe 50 mm EPDM 1 1,682.00
350852
50 Verschraubung mit Schweißmuffe 63 mm EPDM 1 1,742.00
350853
10 Schweißstutzen (Stumpf/Muffe) 16 mm FPM 1 684.00
350854
15 Schweißstutzen (Stumpf/Muffe) 20 mm FPM 1 684.00
350855
20 Schweißstutzen (Stumpf/Muffe) 25 mm FPM 1 1,018.00
350856
25 Schweißstutzen (Stumpf/Muffe) 32 mm FPM 1 1,018.00
350857
32 Schweißstutzen (Stumpf/Muffe) 40 mm FPM 1 1,574.00
350858
40 Schweißstutzen (Stumpf/Muffe) 50 mm FPM 1 1,574.00
350859
50 Schweißstutzen (Stumpf/Muffe) 63 mm FPM 1 1,576.00
350860
10 Verschraubung mit Schweißmuffe 16 mm FPM 1 722.00
350861
15 Verschraubung mit Schweißmuffe 20 mm FPM 1 728.00
350862
20 Verschraubung mit Schweißmuffe 25 mm FPM 1 1,066.00
350863
25 Verschraubung mit Schweißmuffe 32 mm FPM 1 1,644.00
350864
32 Verschraubung mit Schweißmuffe 40 mm FPM 1 1,660.00
350865
40 Verschraubung mit Schweißmuffe 50 mm FPM 1 1,700.00
350866
50 Verschraubung mit Schweißmuffe 63 mm FPM 1 1,760.00
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