Figure 4
. Mounting Pilot on Type E Main Valve
Start-up and Setting
△
CAUTION
Never open a reducing valve without
positive indication that the high side is
clear of condensate.
1. On pressure reducing valves like Type E, use
by-pass to fill the delivery system and raise
pressure to slightly below normal required.
2.
Close pilot by releasing compression on adjusting
spring. See Figure 4.
3. Open 1/4 in. control pipe valve.
4. Crack outlet stop valve.
5. Crack inlet stop valve.
6.
Blow down strainer.
7. Open inlet stop valve and gradually compress
adjusting spring until the valve opens and takes
control at desired pressure.
8.
Alternately choke down on the by-pass and open
outlet stop valve until the regulator is on the line.
See individual instructions for other pilots.
Valve Setting
Valve setting is gaged at K to establish correct stem
length and diaphragm position. Dimension K is
supplied with each replacement stem. See Table 4 for
K values. For metal diaphragm valves, K is cast on the
upper face of pressure plate (key 17, Figure 7).
1.
To install new stem (key 11), fasten disc (key 7)
firmly on stem with stem nut.
2.
Insert stem and disc assembly in valve and screw
on pressure plate (key 17). Omit spring (13) for
this operation.
3.
Hold disc on seat and adjust position of pressure
plate until valve setting K is reached.
4. Push pressure plate against stops in base
(key 16).
5. Remove disc, drop out pressure plate and stem,
drill and insert dowel pin (key 14) to lock the joint.
Grind off stem projection flush with face of pressure plate.
BLEEDPORT BEND
NO. 8B TEE
NO. 4A BLEEDPORT
NO. 5A RESTRICTION ELBOW
TYPE E
RESTRICTION
BEND
ADJUSTING NUTS
ADJUSTING SPRING
SERIAL NO. PLATE
SERIAL NO. PLATE
1/4 IN.
CONTROL
PIPE
1/4 IN.
UNION
MAIN VALVE
TYPE E OR E2
DO NOT INSULATE
BELOW THIS LINE
6
Type E
