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Pressure Retaining Valve made of PVC-U - back pressure safe

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Pressure Retaining Valve made of PVC-U - back pressure safe
 
 

Product specification

Free of plasticizers, therefore physiologically indifferent, no embrittling by leaching

Corrosion and impact resistant, also usable in the outside area.

Technical specification

Material:

Lower valve body: PVC-U (polyvinyl chloride, rigid), grey (RAL 7011)

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

Piston: PVC-U (polyvinyl chloride, rigid)

Separation disc: PVC-U (polyvinyl chloride, rigid)

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

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

O-ring sealings of union ends: EPDM (ethylene-propylene-diene rubber); FPM (fluorinated rubber)

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: +50 °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: cementing spigot or screw joint with cementing 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 350783 10 cementing spigot 16 mm EPDM 1 196.00 Warenkorb
2 350784 15 cementing spigot 20 mm EPDM 1 196.00 Warenkorb
3 350785 20 cementing spigot 25 mm EPDM 1 262.00 Warenkorb
4 350786 25 cementing spigot 32 mm EPDM 1 262.00 Warenkorb
5 350787 32 cementing spigot 40 mm EPDM 1 316.00 Warenkorb
6 350788 40 cementing spigot 50 mm EPDM 1 316.00 Warenkorb
7 350789 50 cementing spigot 63 mm EPDM 1 316.00 Warenkorb
8 350790 10 screw joint with cementing socket 16 mm EPDM 1 214.00 Warenkorb
9 350791 15 screw joint with cementing socket 20 mm EPDM 1 216.00 Warenkorb
10 350792 20 screw joint with cementing socket 25 mm EPDM 1 268.00 Warenkorb
11 350793 25 screw joint with cementing socket 32 mm EPDM 1 276.00 Warenkorb
12 350794 32 screw joint with cementing socket 40 mm EPDM 1 326.00 Warenkorb
13 350795 40 screw joint with cementing socket 50 mm EPDM 1 336.00 Warenkorb
14 350796 50 screw joint with cementing socket 63 mm EPDM 1 348.00 Warenkorb
15 350797 10 cementing spigot 16 mm FPM 1 200.00 Warenkorb
16 350798 15 cementing spigot 20 mm FPM 1 200.00 Warenkorb
17 350799 20 cementing spigot 25 mm FPM 1 254.00 Warenkorb
18 350800 25 cementing spigot 32 mm FPM 1 254.00 Warenkorb
19 350801 32 cementing spigot 40 mm FPM 1 312.00 Warenkorb
20 350802 40 cementing spigot 50 mm FPM 1 312.00 Warenkorb
21 350803 50 cementing spigot 63 mm FPM 1 312.00 Warenkorb
22 350804 10 screw joint with cementing socket 16 mm FPM 1 218.00 Warenkorb
23 350805 15 screw joint with cementing socket 20 mm FPM 1 220.00 Warenkorb
24 350806 20 screw joint with cementing socket 25 mm FPM 1 278.00 Warenkorb
25 350807 25 screw joint with cementing socket 32 mm FPM 1 290.00 Warenkorb
26 350808 32 screw joint with cementing socket 40 mm FPM 1 332.00 Warenkorb
27 350809 40 screw joint with cementing socket 50 mm FPM 1 344.00 Warenkorb
28 350810 50 screw joint with cementing socket 63 mm FPM 1 358.00 Warenkorb

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