Foreign matter in the water may accumulate on 
the seat and cause improper seating or sticking of 
the valve. 
When this condition arises the valve may be 
taken apart, without removing the body from the 
line, and may be cleaned as follows: 
1. Close hand valve. 
2. If necessary remove conduit connections. 
3. With a wrench loosen the clamp nut (11). 
4. Lift coil assembly off of valve body. 
5. Remove valve seat (9) with a proper size 
socket wrench and clean thoroughly. 
6. Remove all foreign matter from the valve 
body (6) and valve stem. 
If the valve body is removed from the line, the 
inside parts may be flushed with pure naphtha. 
CAUTION: Highly inflammable. 
7. Replace valve seat. 
8. Replace plunger (5) in coil (1). 
9. Replace entire assembly over valve body and 
tighten clamp nut. 
10. Test the operation of the valve after re- 
assembling. 
M.H.R. PRINTED IN U.S.A, 
SERVICE SUGGESTIONS 
PAGE 
0.0.2, 
SRR 
e008, 
sana tet 
ox 
<> 
x 
SOKO 
motegtetes 
<> 
= 
WLLL 
GB VALVE 
BODY 
REMOVABLE 
ALVE 
Fig. 3—Internal construction of Type V437A 
and V837A Valves. 
