D1
D2
INSTALLATION OF INTEGRALLY MOUNTED PILOT
TYPICAL INSTALLATION
Figure 3
. Type E Main Valve Installation
VIEW ON INLET
5A RESTRICTION ELBOW
8B TEE
211 BLEEDPORT
4B COUPLING
TYPE D PILOT
TYPE E MAIN VALVE
STRAINER
1/4 IN. CONTROL PIPE PITCH
AWAY FROM PILOT AVOID
WATER POCKETS CONNECT
INTO MAIN LINE
ADJUSTING NUTS – TURN DOWN TO
INCREASE DELIVERY PRESSURE
GLOBE VALVE
AT LEAST 10 PIPE DIAMETERS (D1)
STRAIGHT RUN, FULL SIZE
GATE VALVE
GATE VALVE
GATE VALVE
AT LEAST 20 PIPE DIAMETERS (D2)
TO FIRST TURN OR SECONDARY PRV
OR CONTROL VALVE
AVOID BULL-HEADED CONNECTION TO
LOW PRESSURE STEAM MAIN WHEN
REDUCTION IN NOISE LEVEL IS IMPORTANT
LONG
RADIUS
ELBOW
DRIP AND TRAP AHEAD OF RISE
IN PIPING OR SECONDARY PRV
OR CONTROL VALVE
4 PIPE DIAMS.
(D2) MINIMUM
PREFERRED TRANSITION – 15 IN.
MAX. TOTAL INCLUDED ANGLE
1/4 IN. SENSING PIPE – PITCH AWAY
FROM PILOT, AVOID WATER POCKETS
CONNECT TO D2 PIPE WHERE SHOWN
SPENCE
PRESSURE
REGULATOR
DO NOT INSULATE BELOW THIS
LINE OR ANY PART OF THE PILOT
DRIP AND
TRAP
STRAINER
ALLOW CLEARANCE
ABOVE AND BELOW
FOR MAINTENANCE
4
Type E
