Back pressure relief valve / Vacuum pressure / Dome pressure / Limiter

Back pressure relief valves ZM-B inline & LPS angle valve

Functionality:

Back pressure valves regulate the pressure upstream of the valve.

The ZM-B back pressure relief valve is used to maintain and limit pressure.

The back pressure valve type ZM-B is a diaphragm-controlled, spring-loaded and automatic proportional regulator.

All parts in contact with the product are made of stainless steel 1.4571 / 1.4404 or Hastelloy C. The valve cone is soft-sealing with a valve seal made of perfluoroelastomer (Kalrez / Chemraz / J-6000) or fluoroelastomer (Viton). The tightness of the valve shut-off corresponds at least to VDI / VDE guideline 2174 or DIN EN 1349.

When the pipeline is depressurized, the adjusting spring keeps the valve cone closed. Increasing pre-pressure acts on the diaphragm-spring system. On the diaphragm made of PTFE or Viton, the pre-pressure to be regulated is in equilibrium with the force of the adjusting spring (setpoint). If the inlet pressure rises above the setpoint set on the adjusting screw, the system begins to open. If the pre-pressure drops, the valve is closed and the downstream pressure is maintained. The control accuracy can be increased by an external control line (/ C).

The back pressure relief valve ZM-B is also vacuum-tight.

Product variants:

ZM-B inline & LPS angle valves are suitable for gases
in the overpressure range from 5 to 500 mbar.

ZM-B / N inline & LPS / N angle valves are suitable for gases
in the negative pressure range from approx. - 5 to - 220 mbar

Product option:

ZM-B / D inline contains a connection for an external pneumatic control signal on the top of the diaphragm housing. This means that it is possible to vary the pressure setpoint preset by the spring (dome pressure max. 2 bar; IP 68).

* Option X: weather protection

Technical data - overview

Summary of selected data - further options on request
Nominal size DN 15 / 1/2" DN 25 / 1" DN 50 / 2" DN 100 / 4" on demand
Downstream
(p2, rel.):
Atmosphere / vacuum Atmosphere / vacuum Atmosphere / vacuum Atmosphere / vacuum
Inlet pressure range
(p1, rel.):
       
ZM-B & LPS 3 to 500 mbar 3 to 500 mbar 5 to 500 mbar on demand
ZM-B/D & LPS/D 3 to 2500 mbar 3 to 2500 mbar 5 to 2500 mbar on demand
ZM-B/N & LPS/N -220 to 0 mbar -220 to 0 mbar -220 to 0 mbar on demand
ZM-B/N/D & LPS/N/D -1000 to 0 mbar -1000 to 0 mbar -1000 to 0 mbar on demand
Connections
(DIN/ANSI/Others)
Flange, thread,
Tri-clamp, special connection
on demand
Flange, thread,
Tri-clamp, special connection
on demand
Flange, special connection
on demand
Flange, special connection
on demand
Temperature range - 20...+180 °C -20...+180 °C -20...+180 °C -20...+180 °C
Material: housing and
Interior parts
Stainless steel 1.4571
Hastelloy C
Stainless steel 1.4571
Hastelloy C
Stainless steel 1.4571
Hastelloy C
Stainless steel 1.4571
Hastelloy C
Membrane PTFE / Viton PTFE / Viton PTFE / Viton PTFE / Viton
Kvs 6.5 6.5 15 70
Accessories, optional Manometer,
Stainless steel clasp
Screw,
Weather protection hood,
Control pipe and
Hose lines,
Adapter fittings
Manometer,
Stainless steel clasp
Screw,
Weather protection hood,
Control pipe and
Hose lines,
Adapter fittings
Manometer,
Stainless steel clasp
Screw,
Weather protection hood
Manometer,
Stainless steel clasp
Screw,
Weather protection hood
Protection class IP40 / *IP54 IP40 / *IP54 IP40 / *IP54 IP40 / *IP54
Special connection (optional) Impulse line Impulse line Impulse line Impulse line
Certificates ATEX, FDA, 3.1,
oil and fat free
ATEX, FDA, 3.1,
oil and fat free
ATEX, FDA, 3.1,
oil and fat free
ATEX, FDA, 3.1,
oil and fat free

Download Data sheet ZM-B & LPS

Inquiry

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