32
Operation Manual
Monitoring Weep Holes
Weep holes are manufactured into the manifold
to alert the operator when seals have failed. If a
seal fails, the water will leak from its associated
leakage hole.
There are two types of weep holes, the high
pressure face seal weep holes that are rectangu-
lar slots (Figure 40) and the low pressure uni-
valve seal weep holes that are round. There are
three of each type located along the top of the
manifold.
If water is leaking from one of the rectangular
weep holes, the seal that seals the uni-valve to
the stuffing box has failed. On 15K and 20K man
-
ifolds, the O-ring (Figure 41) on the valve makes
that seal. On 40K manifolds, there is no O-ring
on the valve to seal the manifold. The stuffing
box contains a face seal to seal this connection.
If water is leaking from the round weep holes
(Figure 40), the outer O-rings (Figure 42) on the
valves have failed.
Note:
The larger O-ring will leak to the
rectangular weep hole.
Monitor the manifold for leakage during opera-
tion. If leakage occurs, immediately replace all of
the seals on the leaking valve.
Inspect the valve seats during seal replace-
ment and lap the valves if necessary. Refer to
“Valve Lapping” for instructions.
Monitor the manifold for leakage during op-
eration. If leakage occurs, immediately replace
all of the seals on the leaking valve.
ATTENTION
On 20K manifolds, the rectangular weep holes also
communicates with the top pressure ports. If water
is observed at the rectangular weep holes, first
check the corresponding 20K port connection. The
20K seal pill may need repositioning or replacing.
WARNING
!
!
If leaks are allowed to continue, expensive damage
to the valves or manifold block could occur.
Figure 42: Outer O-rings.
O-rings
Figure 41:
Uni-valve to Stuffing Box Seals.
15K, 20K
15K, 20K
40K
40K
Leak Path
O-Ring
Face Seal
Uni-valve
weep hole
Face Seal weep hole
Figure 40: Weep Holes
Summary of Contents for TwinForce Series
Page 1: ...OPERATION MANUAL TwinForce Series Waterblast Unit...
Page 2: ...Visual Safety System...
Page 11: ...3 TwinForce Series Waterblast Unit...
Page 22: ...14 Operation Manual...
Page 42: ...34 Operation Manual...
Page 48: ...40 Operation Manual...
Page 52: ...44 Operation Manual...
Page 100: ...92 Operation Manual...
Page 104: ...96 Operation Manual...
Page 106: ...A 2 Appendix A Technical Specifications...
Page 107: ...B 1 TwinForce Series Waterblast Unit APPENDIX B LONG TERM STORAGE PROCEDURE...
