Richter BCV/F (ASME) Series Check Valves - Manual (Page 9)

Series CV/F, CVV/F, BC/F, BCV/F
Page 9
9550-050-en Revision 10
TM 8462 Edition 02/2012
6 Installation
Examine valve for in-transit damage, damaged
valves do not install.
Before installation the valve and the connecting
pipe must be carefully cleaned to remove any dirt,
especially hard foreign matter.
During installation, pay attention to the correct
tightening torque, aligned pipes and tension-free
assembly.
6.1 Flange caps and gaskets
Leave protective caps on the flanges until just prior to
installation.
If plastic sealing surfaces, e.g. on mating flanges
made of metal or enamel, can be damaged, use
PTFE-lined seals with a metal inlay.
These gaskets are available as special accessories in
the Richter range.
6.2 Direction of flow and
installation position
The installation positions of the check valves in the
pipe are horizontal, inclined or vertical.
The direction of flow is marked on the valve, the shut-
off operation is already initiated by the weight of the
shut-off element when delivery decreases.
The ball check valves are highly streamlined. The
design with a solid ball (CV/F) seals against a falling
or back-flowing fluid level.
The CVV/F design with a hollow ball can also be used
for low opening differential pressures. When the
installation position is reversed, the CVV/F also func-
tions as a vacuum check valve.
In the vertical installation position the ball then floats
on the rising fluid level and seals upwards into the
seat.
Horizontally installed, a minimum differential pressure
of 1 bar (with a hollow ball 0.5 bar) is required to push
the ball into the seat.
6.3 Grounding
The valve must be grounded. The simplest solution is
to use tooth lock washers which are placed under one
pipe bolt of each flange..
At the customer's request a setscrew M6 with a hex.
nut and washer will be provided at each flange as an
additional grounding connection.
Otherwise grounding must be ensured by different
measures e.g. a cable link.
6.4 Test pressure
The test pressure PT of a valve must not exceed the
value of 1.5 x PS(PN) as per the identification of the
valve.
Not permitted with series CVV/F, remove the hollow
ball for the pressure test.