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

Product specification Free of plasticizers, therefore physiologically indifferent, no... more

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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... more

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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	NW mm	Connection	Werkstoff Dichtung	Einheit Stück	Price Euro*
350783	10	Klebestutzen 16 mm	EPDM	1	357.00
350784	15	Klebestutzen 20 mm	EPDM	1	357.00
350785	20	Klebestutzen 25 mm	EPDM	1	478.00
350786	25	Klebestutzen 32 mm	EPDM	1	478.00
350787	32	Klebestutzen 40 mm	EPDM	1	576.00
350788	40	Klebestutzen 50 mm	EPDM	1	576.00
350789	50	Klebestutzen 63 mm	EPDM	1	576.00
350790	10	Verschraubung mit Klebemuffe 16 mm	EPDM	1	389.00
350791	15	Verschraubung mit Klebemuffe 20 mm	EPDM	1	394.00
350792	20	Verschraubung mit Klebemuffe 25 mm	EPDM	1	488.00
350793	25	Verschraubung mit Klebemuffe 32 mm	EPDM	1	503.00
350794	32	Verschraubung mit Klebemuffe 40 mm	EPDM	1	593.00
350795	40	Verschraubung mit Klebemuffe 50 mm	EPDM	1	612.00
350796	50	Verschraubung mit Klebemuffe 63 mm	EPDM	1	634.00
350797	10	Klebestutzen 16 mm	FPM	1	364.00
350798	15	Klebestutzen 20 mm	FPM	1	364.00
350799	20	Klebestutzen 25 mm	FPM	1	462.00
350800	25	Klebestutzen 32 mm	FPM	1	462.00
350801	32	Klebestutzen 40 mm	FPM	1	568.00
350802	40	Klebestutzen 50 mm	FPM	1	568.00
350803	50	Klebestutzen 63 mm	FPM	1	568.00
350804	10	Verschraubung mit Klebemuffe 16 mm	FPM	1	398.00
350805	15	Verschraubung mit Klebemuffe 20 mm	FPM	1	401.00
350806	20	Verschraubung mit Klebemuffe 25 mm	FPM	1	507.00
350807	25	Verschraubung mit Klebemuffe 32 mm	FPM	1	529.00
350808	32	Verschraubung mit Klebemuffe 40 mm	FPM	1	605.00
350809	40	Verschraubung mit Klebemuffe 50 mm	FPM	1	627.00
350810	50	Verschraubung mit Klebemuffe 63 mm	FPM	1	653.00