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Kvs-valueValve for high pressures + high temperature, high flow rates
Pressure reducing valves DM 401

The pressure reducer DM 401

is a diaphragm or piston-controlled spring-loaded proportional control valve with pressure relief for large flow rates at low pressure drops. The valve cone is fitted with a metallic seal.
Technical data
Connection DN 25 - 250
Nominal pressure PN 16 - 100
Inlet Pressure* up to 100 bar
Outlet Pressure 1.5 - 32 bar
Kvs-value 6 - 360 m³/h
Temperature 500 °C
Medium Steam
*RT = -10 °C up to + 50 °C

Description

Self-acting pressure reducers are simple control valves offering accurate
control while being easy to install and maintain. They control the pressure
downstream of the valve without requiring pneumatic or electrical control elements.
The DM 401 pressure reducing valve is a diaphragm or piston-controlled
spring-loaded proportional control valve with pressure relief for large flow
rates at low pressure drops. The valve cone is fitted with a metallic seal.
The outlet pressure to be controlled is balanced across the control unit by
the force of the valve spring (set pressure). As the outlet pressure rises
above the pressure set using the adjusting screw, the valve cone moves towards the seat and the volume of medium is reduced. As the outlet pressure
drops, the valve control orifice increases; when the pipeline is depressurised, the valve is open. Rotating the adjusting screw clockwise increases
the outlet pressure.
The valve requires a sense line (to be installed on-site).
These valves are no shut-off elements ensuring a tight closing of the valve.
In accordance with DIN EN 60534-4 and/or ANSI FCI 70-2 they may feature
a leakage rate in closed position in compliance with the leakage classes II.

Standard

» Balanced cone for controlling the outlet pressure indipendently from the
inlet pressure
» Sense line connection
» Open spring

Options

» Polished version for food, pharmaceutical and superclean applications
» surface roughness: Ra ≤ 0.25/ ≤ 0.4/ ≤ 0.8 µm
» Diaphragm protection by PTFE foil
» Soft seal
» Electro-pneumatic actuation
» For toxic or hazardous media: sealed bonnet complete with leakage line
connection (incl. sealed adjusting screw). Must be installed with a leakage line capable of draining leaking medium safely and without pressure
» Various diaphragm and seal materials suitable for your medium
» Special connections: Aseptic, ANSI or DIN flanges, NPT, welding spigots; other connections on request
» Special versions on request

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Technical specification