TLV PowerTrap GP10L, Инструкция по эксплуатации

Страница: 32 / 36

172-65043MA-02 (GP10L/GT10L PowerTrap ) 9 Mar 2004
31
Causes and Corrective Measures
Category Cause Procedure
A.
A valve on
the pipeline
is closed 1. The valve on the
motive medium supply
pipe is closed
2. The valve on the
exhaust pipe is closed
3. The valve on the
condensate inlet pipe is
closed
4. The valve on the
condensate outlet pipe
is closed
• Slowly open the valve, using the proper procedure
B.
The
strainer is
clogged 1. The strainer on the
motive medium supply
pipe is clogged
2. The strainer on the
condensate inlet pipe is
clogged
• Clean the strainer
1. The motive medium
supply pressure is less
than the back pressure
• When the motive medium pressure is decreasing,
adjust the pressure reducing valve on the supply
pipe or connect to a separate high-pressure line
• If the back pressure has increased, check to see if
a steam trap connected to the condensate
recovery line [Sr] is blowing (see drawings on
pages 8 - 9) and check for any valves that have
been left closed on the condensate recovery line
• The motive medium pressure must be about 0.1
MPa (15 psi, 1 bar) higher than the back pressure
(see page 11)
2. Insufficient motive
medium
• If the motive medium supply pipe is too small,
change to a larger size pipe; the pipe should be at
least 15 mm (½”)
3. When using the GP,
the condensate inlet
pressure exceeds the
back pressure
(see G.1. on page 33)
• When the condensate inlet pressure exceeds the
back pressure, “blowthrough” occurs, i.e., steam
flows into the condensate outlet pipe; in some
cases, chattering on the outlet check valve or water
hammer may also occur
• The same thing will occur when the back pressure
has decreased in a closed system
• Check the reason that the condensate inlet
pressure has increased and the back pressure has
decreased and make any necessary repairs
C.
Faulty
motive,
back or
condensate
inlet
pressure
4. When using the GP,
motive medium supply
pressure is too high
• If the motive medium supply pressure is twice the
back pressure or greater, “blowby” occurs, i.e.,
residual pressure at the end of the GP motive
medium supply process flows into the outlet pipe;
when the temperature of the condensate in the
recovery pipe is low, water hammer may also occur
• The motive medium supply pressure should be
reduced to a range within which the discharge flow
does not drop below the required level