Pressure Retaining Valve made of PP - back pressure safe

Product specification Corrosion and impact resistant Technical specification Material:... more

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Product specification

Corrosion and impact resistant

Technical specification

Material:

Lower valve body: PP (polypropylene), grey (RAL 7032)

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

Piston: PP (polypropylene)

Separation disc: PP (polypropylene)

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 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: +70 °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

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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*
350811	10	Schweißstutzen (Stumpf/Muffe) 16 mm	EPDM	1	249.00
350812	15	Schweißstutzen (Stumpf/Muffe) 20 mm	EPDM	1	249.00
350813	20	Schweißstutzen (Stumpf/Muffe) 25 mm	EPDM	1	336.00
350814	25	Schweißstutzen (Stumpf/Muffe) 32 mm	EPDM	1	336.00
350815	32	Schweißstutzen (Stumpf/Muffe) 40 mm	EPDM	1	414.00
350816	40	Schweißstutzen (Stumpf/Muffe) 50 mm	EPDM	1	414.00
350817	50	Schweißstutzen (Stumpf/Muffe) 63 mm	EPDM	1	414.00
350818	10	Verschraubung mit Schweißmuffe 16 mm	EPDM	1	277.00
350819	15	Verschraubung mit Schweißmuffe 20 mm	EPDM	1	281.00
350820	20	Verschraubung mit Schweißmuffe 25 mm	EPDM	1	369.00
350821	25	Verschraubung mit Schweißmuffe 32 mm	EPDM	1	373.00
350822	32	Verschraubung mit Schweißmuffe 40 mm	EPDM	1	450.00
350823	40	Verschraubung mit Schweißmuffe 50 mm	EPDM	1	465.00
350824	50	Verschraubung mit Schweißmuffe 63 mm	EPDM	1	495.00
350825	10	Schweißstutzen (Stumpf/Muffe) 16 mm	FPM	1	281.00
350826	15	Schweißstutzen (Stumpf/Muffe) 20 mm	FPM	1	281.00
350827	20	Schweißstutzen (Stumpf/Muffe) 25 mm	FPM	1	381.00
350828	25	Schweißstutzen (Stumpf/Muffe) 32 mm	FPM	1	381.00
350829	32	Schweißstutzen (Stumpf/Muffe) 40 mm	FPM	1	467.00
350830	40	Schweißstutzen (Stumpf/Muffe) 50 mm	FPM	1	467.00
350831	50	Schweißstutzen (Stumpf/Muffe) 63 mm	FPM	1	467.00
350832	10	Verschraubung mit Schweißmuffe 16 mm	FPM	1	313.00
350833	15	Verschraubung mit Schweißmuffe 20 mm	FPM	1	319.00
350834	20	Verschraubung mit Schweißmuffe 25 mm	FPM	1	422.00
350835	25	Verschraubung mit Schweißmuffe 32 mm	FPM	1	428.00
350836	32	Verschraubung mit Schweißmuffe 40 mm	FPM	1	525.00
350837	40	Verschraubung mit Schweißmuffe 50 mm	FPM	1	544.00
350838	50	Verschraubung mit Schweißmuffe 63 mm	FPM	1	583.00