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Valves VS 100, VS 110, VS 120 and Two Valve Manifolds VS 200
4. Installation, operation and maintenanceu
4.1 Installation and commissioning
4.1.1 General
The shut off valve is fixed using a connecting screwing,
between the impulse piping or directly on the pressure
sensor. The impulse piping with diameter 12 or 14 mm
is connected by welding to the plow or nipple, see Fig. 2. To
ensure correct position of the nipple or plow, after installation it
shall be welded together with the shut off valve.
Before installation, the impulse piping shall be cleaned from all
dirt. After welding it shall be disconnected from the manifold
and purged to remove any possible dirt from welding.
Piping with outer diameter 8, 10, 12 or 14 mm can be also
connected by using a cutting ring. The minimum length of the
impulse piping to the first bend shall be 33 mm from the pipe
face. The pipe face shall be cut off perpendicularly and the inner
and outer edges shall be deburred. To prevent penetration of
any possible dirt between the contact surfaces, all part shall be
properly cleaned before installation.
Before connection of the sensor it is recommended to test co-
rrectness of connection (welding) of the shut off valve by pre-
ssurization of the impulse piping.
When both connections of threaded parts are made of
stainless steel, there is danger of galling (formation of
cold weld). This can also occur during ordinary scre-
wing by hand without using tightening key. If the cold weld is
made, the thread is then damaged and parts are unusable. Be-
fore first screwing, it is therefore necessary to check whether
threads are free of impurities (and clean if needed) and then
treat the threads against galling (formation of cold weld) by
appropriate lubricant. For example use paste G-Rapid plus or
Lukosan M11 (in case of connection for oxygen). For tapered
threads is usually used Teflon tape. Threads with silver covered
surface do not have to be lubricated against galling.
4.1.2 Commissioning
After connection or welding of the impulse piping the shut
offvalve is ready for operation.
After installation of a shut off valve into piping it is necessary to
carry out deaeration of the piping. Deaeration for shut off valve
VS 100 and VS 120 can be done by deaeration screw M6. In
another case the deaeration is done by releasing of air bubbles
by knocking on the piping. The whole system can be flooded
by condensate when the thermal circuit is shut down and the
valve is closed.
In case of a leakage of the spindle gland with valve having
gland packing adjuster, the leakage can be eliminated by
tightening the adjuster screw and the lock nut.
4.1.3 Cleaning the manifold
Clogged manifold may be cleaned only if pressure
medium in the impulse piping is completely disconnected.
Before cleaning of a clogged fitting, screw out the small
valve(s) from the basic body. First remove the valve lock
pin, then screw out the valve and clean the interconnection
channels eventually the valve seat. When cleaning the fitting,
pay attention to the seating (sealing) edge of the valve to
prevent its damage.
Before installation of the valve into the fitting body it is
necessary to screw in the valve spindle up to the stop into the
valve body. To improve tightening and sealing of the valve in the
fitting it is recommended to apply a Teflon tape or a liquid Teflon
compound on the seating surface behind the valve threads.
Tighten the valve to 55 Nm and then press in the locking pin.
In case of cleaning of a manifold designed for use with
oxygen, avoid staining of individual parts of the manifold
with grease. The threads and sealing joints may be
lubricated only by a paste approved for use with oxygen.
4.2 Interconnection diagram
VS 100 VS 110 VS 120 VS 200
4.3 Examples of mounting of the manifolds in operation
Bracket for wall mounting Bracket for pipe mounting Shim for mounting of VS 200
