Sheet 1597-1 Page 4
OPERATION Main Flow Setting
Initial Lift Adjustment
The valves are supplied with the main flow adjustment fully open. To adjust the gas flow proceed as follows:
The initial lift adjustment varies the initial gas flow through the valve as the valve seat begins to open. This adjustment can vary the initial flow between 0 and 70% of the total gas flow. All Double Shutoff Valves are shipped from the factory with the slowest initial lift. To adjust the lift proceed as follows: — Unscrew the small black cap on top of the flow adjustment cap to expose the initial lift adjustment knob (Drawing-- Exploded View). —The black cap also serves as tool; turn the cap over and insert it into the corresponding slot on the adjustment knob. —Turn the knob clockwise for a shorter initial lift or counterclockwise for a longer initial lift. —Once the desired initial lift has been achieved, reinstall the black cap.
— CAUTION: Make sure the flow of gas does not create a hazard. —Locate the flow adjustment cap on top of the Double Shut- off Valve. There are two screws in the cap. The holding screw is recessed and has a blue sealing compound on it, while the pan head screw protrudes from the cap. — CAUTION : Do not adjust or remove any screws or bolts which are sealed with a red or blue colored compound. Doing so will void all approvals and warranties. —Loosen the pan head screw until you can manually rotate the flow ad- justment cap for 11/2 to 2 turns. —Turn the cap clockwise for less gas or counterclockwise for more gas. —Check the flow at the burner with an orifice or flow meter until you have achieved the desired flow. —Tighten the pan head screw on the adjustment cap.
Test Port
The G 1/8 ISO 228 taps are available on both sides upstream V1, between V1 and V2, downstream V2, and on both flanges. The G 1/8 test nipple can be screwed in any of these pressure tap ports.
Pan Head Screw
Adjustment Cap Black Cap
Adjustment Cap
2 3
1
Pan Head Screw
P max. = 7 psi
4
5
5
4
4
5
V1
V2
2 3
1
1
2 3
1
DIMENSIONS and FLANGES
Flange part number NPT pipe size R947-3100 1/2" R947-3102 3/4" R947-3104 1" R947-3106 11/4" R947-3108 11/2" R947-3110 2"
D
dimensions in inches
Weight
Part Number A B C D E
lb
R947-3010 R947-3020
35/8 47/8
55/8 67/8
13/8 17/8
53/8 57/8
27/8 37/8
4.6
C
10.1
A
B
E
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC. IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL .
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