Rp 8401 Van Giảm Áp Rp 8401 Mankenber, Mankenber Viet Nam

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PRESSURE CONTROL
Pressure reducing valve RP 840
Pilot-operated millibar control valve

Technical data

Connection DN 25 - 150
Nominal pressure PN 16
Inlet Pressure up to 16 bar
Outlet Pressure 0.002 - 0.52 bar
Kvs-value 4 - 160 m³/h
Temperature 130 °C
Medium gases

Description

Self-acting back pressure regulators are simple control valves offering accurate control while being easy to install and maintain. They control the pressure upstream of the valve without requiring pneumatic or electrical control
elements.
The pressure reducing valve RP 840 is a pilot-operated control valve consisting of a main valve for high flow rates combined with a millibar valve
serving as pilot valve. Both valves are manufactured from deep-drawn stainless steel featuring excellent corrosion resistance and are arranged as a premounted unit in a rack. The valve cone is soft-sealed.
If the outlet pressure falls below the pre-set nominal value, the pilot valve is
kept open by its spring. The control medium flows off towards the valve outlet. Throttle D1 brings about a pressure drop, so that the control pressure in
the main valve control mechanism nearly corresponds to the outlet pressure.
The inlet pressure overcomes the outlet pressure and the closing spring
force and opens the main valve.
Once the outlet pressure has reached the pre-set nominal value, the pilot
valve starts to throttle. In doing so, the control pressure rises and pushes the
main valve control mechanism to a regulating position. The throttles D1 and
D2 serve to optimise the regulating behaviour. The bypass brings about rapid
closure.
If the outlet pressure exceeds the nominal value, the pilot valve closes. The
control pressure is equivalent to the inlet pressure. The main valve closes
because the control mechanism diameter is larger than the valve seat. In addition, the spring also has a closing effect.
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 V.

Standard

» Pilot valve made of stainless steel
» Throttle block with integrated strainer and throttle valves completely
made of stainless steel

Optionen

» Manometer connection
» Various diaphragm and seal materials suitable for your medium
» Special connections:
ANSI or JIS flanges, other connections on request
» Special versions on request

Technical specification

Technische Spezifikation