172-65043MA-02 (GP10L/GT10L
PowerTrap
) 9 Mar 2004
12
(6) Valves on the Various Pipes
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In order to ensure the proper discharge capacity for the valves on the condensate
inlet and outlet pipes and the valves on the motive medium supply and exhaust
pipes, use full bore ball valves or gate valves.
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 pages 18 and 19.)
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Install union or flanged joints between the valves and the
PowerTrap
to allow for
easy maintenance.
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Be sure to provide the necessary maintenance space for
PowerTrap
disassembly and repair (see “Installation and Maintenance Space”).
(7) Condensate Receiver/Reservoir Pipe and Filling Head
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When choosing the size of the condensate receiver/reservoir pipe, please refer to
“Size of the Condensate Receiver/Reservoir Pipe” on pages 14 and 15.
The size and vent pipe aperture are determined by (a) the amount of flash steam
in the in-flowing condensate and (b) the amount of condensate held back while
the
PowerTrap
is discharging condensate.
If the condensate receiver is small, the flow of flash steam will cause the
condensate to flow out the vent pipe.
If the vent pipe size is small, the pressure in the condensate receiver will rise,
restricting condensate inflow.
Be sure to select a condensate receiver/reservoir pipe of the correct size.
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The filling head represents the distance from the bottom of the
PowerTrap
(from
grade) to the bottom of the condensate receiver or reservoir pipe.
The standard filling head is 630 mm (25").
When an installation calls for a lower filling head, a filling head of less than
630 mm (25") is allowable. However, filling heads lower than the minimum filling
heads listed below must not be used:
Inlet Check Valve Model:
Minimum Filling Head:
TLV CK3MG
450 mm (18")
TLV CKF3M
550 mm (22")
Swing Check Valve
350 mm (14"); motive medium pressure
≤
0.5 MPaG (72.5 psig, 5 barg)
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For Open Systems
: If venting flash steam to a high area, an overflow pipe must
be installed to discharge condensate to a safe area.
•
When discharging flash steam from the receiver upward through the
pipe to outside atmosphere, be sure to install an overflow pipe and
discharge to a safe area such as a pit. Failure to install an overflow pipe
is dangerous, as condensate may spurt from the vent pipe and could
result in burns and other injuries.
•
To minimize the discharge of flash steam from the overflow pipe, use an
overflow pipe with a U-shaped section about 300 mm (12”) in length.
WARNING
Summary of Contents for PowerTrap GP10L
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