INSTALLING DISTRIBUTION PIPING (Continued)
Distribution and Manifold Piping (Continued)
2. The maximum number of cylinders that can be back
pressure actuated from a pilot or set of pilot cylinders
is 40. When more than 40 cylinders are required, up to
12 additional sets of pilot cylinders (each operating 40
cylinders) can be pneumatically actuated from a pilot
manifold. See Figure 8.1.
The installation guidelines that must be followed are:
• 1/4 in. Schedule 80 pipe ASTM A-53 ERW or seam-
less grade A or B, or Grades A106 A, B or C and
2000/3000 lb. class fittings (ANSI B-16.11) must be
used on actuation manifold.
• Maximum length of actuation manifold is 55 ft.
(16.8 m).
• Maximum of 12 pilots valves can be actuated from
actuation manifold.
• Actuation manifold must start from pilot manifold as
far from the distribution pressure reducer as possible.
• The actuated pilot valve must be located in the
distribution manifold as far from the distribution
pressure reducer as possible.
• When piping the actuation manifold to the pilot
valve(s), use Straight Adaptor, Part No. 832338 (or
elbow Part No. 831810), Stainless Braided Hose,
Part No. 831809, 832335, or 832336, Male Elbow,
Part No. 832334, and Valve Actuation Adaptor, Part
No. 873236.
• Refer to Step No. 25, “Additional Secondary Pilot
Cylinder Requirements” in Design Section, for addi-
tional design information.
FIGURE 8.1
002210
INSTALLING DISTRIBUTION PIPING (Continued)
SECTION VI
UL EX-4510 12-1-01 Page 6-10
Installation
START ACTUATION MANIFOLD
AS FAR FROM PRESSURE
REDUCER AS POSSIBLE
ACTUATION
MANIFOLD
12
2
1
1
40
VALVE ACTUATION ADAPTOR
– PART NO. 873236
STRAIGHT ADAPTOR – PART NO. 832338
(OR ELBOW PART NO. 831810)
STAINLESS BRAIDED HOSE
PART NO. 831809 – 16 IN. (40.6 cm)
PART NO. 832335 – 20 IN. (50.8 cm)
PART NO. 832336 – 24 IN. (60.9 cm)
LOCATE PILOT VALVE IN
DISTRIBUTION MANIFOLD ON END
OPPOSITE OF PRESSURE REDUCER
DISTRIBUTION MANIFOLD
PRESSURE
REDUCER
NOTE: SEE STEP NO. 2
FOR ADDITIONAL
INFORMATION
MAXIMUM OF 55 FT. (16.8 m) 1/4 IN. PIPING
MALE ELBOW
– PART NO. 832334
CHECK VALVE
