Adjustable port valves are for control purposes only. They are not for tight shutoff. North American Adjustable Port Valves THIS
Instructions & Parts List 1008A/1010A/1008A-C/1010A-C
NOT THIS
GENERAL INFORMATION Adjustable Port Valves are ideal for automatic control of fuel or air flow to meet the requirements of modern instrumentation in combustion systems. The adjustable port feature permits sizing the valve to fit the application, after valve has been installed. Linkages can be adjusted for full or limited valve travel. INSTRUCTIONS gas, oil, steam, compressed air Adjustable Port Valves are precision built and should not be sub- jected to unnecessary strains or rough handling. Provide proper pipe alignment by use of pipe hangers and supports. Instead of holding the valve body itself between jaws of a vise, screw valve onto a piece of pipe held in a vise. When installing the valve in a pipe line, use a pipe wrench at the lugs provided. Valve port should be adjusted so some pressure drop is ob- served across valve at high fire. To adjust valve port opening for required flow conditions, set linkage at full valve travel. Remove adjusting screw cover. For sizes ¾" to 6" turn adjusting screw knob clockwise to increase or counterclockwise to de- crease flow. For size 3⁄8" and ½" turn knob clockwise to decrease flow or counterclockwise to increase flow. This raises or lowers the curtain in the core, altering valve port opening.
Use two wrenches to tighten a pipe into the valve.
THIS
NOT THIS
The packing nut should be tight to prevent valve from leaking around adjusting screw and it secures the adjusting screw in position, therefore it is difficult to operate the port adjustment by hand, necessitating use of a wrench. Always assure packing nut is tightened to prevent leakage and always replace adjusting screw cover to prevent tampering after making any curtain adjustments. 1008A valves are factory lubricated with general purpose lithium #2 grease. For lubrication instructions see page 2 (see page 3 for oxygen use). The table (below) shows the number of turns required for adjusting the curtain height from full open to fully closed.
CONTROL HANDLE
Number of turns from full open to fully closed
Valve Size
3⁄8 " and ½"
11
¾ "
14 16
1"
CORE
1¼" and 1½"
23 30 35 43 60 87
PORT OPENING
2"
CURTAIN
2 ½ "
3" 4" 6v
CURTAIN ADJUSTING KNOB
Made with FlippingBook flipbook maker