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Pressure Retaining Valve made of PVDF - back pressure safe

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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 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 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.

Position Item NW
mm
Connection Material gasket Unit
piece
Price
Euro
Buy
1 350839 10 butt fusion spigot or socket fusion spigot 16 mm EPDM 1 672.00 Warenkorb
2 350840 15 butt fusion spigot or socket fusion spigot 20 mm EPDM 1 672.00 Warenkorb
3 350841 20 butt fusion spigot or socket fusion spigot 25 mm EPDM 1 1,010.00 Warenkorb
4 350842 25 butt fusion spigot or socket fusion spigot 32 mm EPDM 1 1,010.00 Warenkorb
5 350843 32 butt fusion spigot or socket fusion spigot 40 mm EPDM 1 1,590.00 Warenkorb
6 350844 40 butt fusion spigot or socket fusion spigot 50 mm EPDM 1 1,590.00 Warenkorb
7 350845 50 butt fusion spigot or socket fusion spigot 63 mm EPDM 1 1,590.00 Warenkorb
8 350846 10 screw joint with welded socket 16 mm EPDM 1 708.00 Warenkorb
9 350847 15 screw joint with welded socket 20 mm EPDM 1 708.00 Warenkorb
10 350848 20 screw joint with welded socket 25 mm EPDM 1 1,060.00 Warenkorb
11 350849 25 screw joint with welded socket 32 mm EPDM 1 1,080.00 Warenkorb
12 350850 32 screw joint with welded socket 40 mm EPDM 1 1,646.00 Warenkorb
13 350851 40 screw joint with welded socket 50 mm EPDM 1 1,682.00 Warenkorb
14 350852 50 screw joint with welded socket 63 mm EPDM 1 1,742.00 Warenkorb
15 350853 10 butt fusion spigot or socket fusion spigot 16 mm FPM 1 684.00 Warenkorb
16 350854 15 butt fusion spigot or socket fusion spigot 20 mm FPM 1 684.00 Warenkorb
17 350855 20 butt fusion spigot or socket fusion spigot 25 mm FPM 1 1,018.00 Warenkorb
18 350856 25 butt fusion spigot or socket fusion spigot 32 mm FPM 1 1,018.00 Warenkorb
19 350857 32 butt fusion spigot or socket fusion spigot 40 mm FPM 1 1,574.00 Warenkorb
20 350858 40 butt fusion spigot or socket fusion spigot 50 mm FPM 1 1,574.00 Warenkorb
21 350859 50 butt fusion spigot or socket fusion spigot 63 mm FPM 1 1,576.00 Warenkorb
22 350860 10 screw joint with welded socket 16 mm FPM 1 722.00 Warenkorb
23 350861 15 screw joint with welded socket 20 mm FPM 1 728.00 Warenkorb
24 350862 20 screw joint with welded socket 25 mm FPM 1 1,066.00 Warenkorb
25 350863 25 screw joint with welded socket 32 mm FPM 1 1,644.00 Warenkorb
26 350864 32 screw joint with welded socket 40 mm FPM 1 1,660.00 Warenkorb
27 350865 40 screw joint with welded socket 50 mm FPM 1 1,700.00 Warenkorb
28 350866 50 screw joint with welded socket 63 mm FPM 1 1,760.00 Warenkorb

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