172-65318MA-04 (GP10/GT10/GP14/GT14 PowerTrap) 23 Nov 2018
12
(6) Valves on the Various Pipes
•
In order to ensure the proper discharge capacity, use full bore ball valves or gate
valves on the pumped medium inlet and outlet lines as well as on the motive
medium supply and exhaust lines.
If it is necessary to reduce the velocity of the motive medium supply, a needle valve
can be used. However, be aware that the discharge capacity will be reduced.
(Refer to “Operation” (1). e) on page 20.)
•
Install union or flanged joints between the valves and the PowerTrap to allow for
easy maintenance.
•
Be sure to provide the necessary maintenance space for PowerTrap disassembly
and repair (see “Installation and Maintenance Space” on page 18).
(7) Receiver/Reservoir Pipe and Filling Head
•
Please refer to “Sizing the Condensate Receiver/Reservoir” on pages 14 - 16.
The size and vent pipe aperture are determined by (a) the amount of any flash
steam in the in-flowing condensate (pumped medium) and (b) the amount of
pumped medium held back while the PowerTrap is discharging.
If the receiver is small, the flow of flash steam may cause condensate to flow out
the vent pipe.
If the vent pipe size is small, the pressure in the receiver will rise, restricting the
pumped medium inflow.
Be sure to select a receiver/reservoir pipe of the correct size.
•
The filling head represents the distance from the bottom of the PowerTrap (from
grade) to the bottom of the receiver/reservoir.
The standard filling head is 860 mm (36 in).
When an installation calls for a lower filling head, a filling head of less than 860 mm
(36 in) is allowable. However, the minimum filling head is 710 mm (30 in).
•
For Open Systems
:
- If venting flash steam to a high area, an overflow pipe must be installed to discharge
condensate to a safe area.
- Overflow pipe should be installed at the side of the receiver.
•
Be sure to install a vent pipe and an overflow pipe. Failure to install an
overflow pipe is dangerous, as condensate may spurt from the vent pipe
and could result in burns and other injuries.
•
Pipe the vent pipe and the overflow pipe to a safe place such as a pit.
•
Piping size of the overflow pipe should be the same or larger than
condensate inlet pipe.
WARNING
Examples of Overflow Piping for Open Systems
30
0 m
m
(12 i
n)
Condensate
Receiver
1)
2)
Flash Steam
Flash Steam
Condensate
Receiver
To
PowerTrap
To
PowerTrap
Flash Steam
Vent Pipe
Vent Pipe
Overflow Pipe
Overflow Pipe
Condensate
Condensate
Loop Seal
NOTE:
This sketch is for
explanation purposes only
and is not intended as an
installation design.
Pipe the discharge to a safe place such as a pit.
High temperature steam or hot water may splash.
There is a possibility of condensed hot water dripping from vent pipe outlet.
aake sure to extend to where people do not pass.
30
0 m
m
(12 i
n)
Condensate
Receiver
1)
2)
Flash Steam
Flash Steam
Condensate
Receiver
To
PowerTrap
To
PowerTrap
Flash Steam
Vent Pipe
Vent Pipe
Overflow Pipe
Overflow Pipe
Condensate
Condensate
Loop Seal
NOTE:
This sketch is for
explanation purposes only
and is not intended as an
installation design.
Pipe the discharge to a safe place such as a pit.
High temperature steam or hot water may splash.
There is a possibility of condensed hot water dripping from vent pipe outlet.
aake sure to extend to where people do not pass.