Flowserve HV 215 - Manual (Page 11)


Explanatory Notes
– continued –
The loading and unloading system HV 25 is designed for filling and draining tanks that contain pressure-
liquefied gases.
One bottom valve opens for the liquid phase and the other opens for the gas phase. Both opening processes
always take place simultaneously.
The operating device of the tension rope (e. g. rail hook VZ 0) engaged to one of the rails provides the required
tension of the rope. This tension keeps the ball valve of the control unit of the hydraulic system closed.
The hydraulic hand pump of the operating device BV 0 can then be used to apply pressure to the hydraulic
system. The pressure acts on the actuating cylinders of the bottom valves, forcing the piston to go up and thereby
causing the bottom valves to open.
The current lift position of both bottom valves is indicated separately by the indicating cylinders of the operating
device BV 0.
When the rail hook is disengaged, i. e. when the load on the tension rope is reduced, the hydraulic system opens,
leading to the rapid-action closing of the bottom valves within less than  second.
The non-return valve integrated in the operating device BV 0 prevents the premature closing of the bottom
valves caused by leaking fluids in the hydraulic hand pump and the pressure-reducing valve.
Function
Technical data
For pressure / temperature ratings of the bottom valves see name plate.
Attention
Name plate drawing Name plate specifications
Type of bottom valve
Type approval
GESTRA manufacturing no.
Test pressure
Type of valve plug seal used
in valve head
TÜ. AGG.
Manu.-no.:
P
test
: 37.5bar
T
min.
: - 50°C valve plug seal PTFE
T
min.
: - 40°C valve plug seal CR
GESTRA HWV
MADE BY GESTRA