Mankenberg UV Originalbetriebsanleitung Seite 7

Original operating manual
spring-actuated pressure control valves UV
These valves are no shut-off elements ensuring a tight closing of the valve. 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
danger of
leakage classes II – V:
fatalities
Leakage class II (metal sealing double seat cone) = 0.5% K
Leakage class III (metallic sealing cone) = 0.1% K
Leakage class IV (PTFE seal cone) = 0.01% K
Leakage class V, soft seal cone = 1.8 x 10
Consequently, according to DIN EN ISO 2503 and DIN EN ISO 7291, a safety valve has to be
installed on the control side, which is dimensioned and adjusted in such a way that the lower
one of both pressure indications as mentioned below is relevant as response pressure:
- 1.5 times the maximum set pressure and/or (P out) of the valve (see nameplate), whichever
is the lowest
- PS out (see nameplate)
The actuation pressure of the safety valve should be approx. 40% above the max. set value of
the pressure control valve.
The response pressure of the safety valve should be abt. 40 % above the max. set pressure of
the pressure control valve.
Failure to observe this regulation means danger to life and limb and may cause damage
to the pressure-regulating valve.
Pressure-regulating valves are generally supplied with an open bonnet to facilitate
maintenance.
Valves with a sealed bonnet and leakage line connection can be supplied for toxic or
caution
hazardous media. In this case the user must make sure that a suitable leakage line is installed.
Mankenberg valves are supplied as standard for screw-mounted or flange-mounted pipeline/tank connections –
also for special connections if required.
The upper limit of the permitted operating data for pressure and temperature is permanently marked on each
valve supplied.
Pressure gauge option - The technical data of the pressure gauge (connection size and temperature) must
match those of the valve and the plant.
The valve is not ready for use in the delivered condition because the pressure gauge connection is open and no
pressure gauge is supplied. The technical tightness between pressure gauge connection and pressure gauge is
established by the operator.
Option vacuum-proof design- The valve is vacuum-proof and thus can be exposed to external overpressure
to a limited extent.
Gas bonnet option - The outlet pressure to be controlled generates a force on the diaphragm which is in
balance with the gas load in normal operating conditions.
When the inlet pressure and outlet pressure lines are depressurized, the valve is open. When the outlet
pressure rises above the set point adjusted by the gas spring, the valve closes; when the pressure falls below
the set point, the valve opens.
UV-4.X.23.2 Issue 16.08.2023
value
vs
value
vs
value
vs
-5
x Δp x D** [l/h]
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