Milliken Plug Valves
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Cast Iron Rectangular Port / Reduced Bore
170M/171M - 1 1/2'' - 6'' (Wrench Operated)
171MG - 6'' - 12'' (Gear Operated)
The principle of the Milliken plug valve is as simple as its design. The plug, which is the only moving part of the valve, when open, presents a straight through passage in line with the pipeline, and when turned through 90 degrees to the closed position stops the flow.
A special sealing lubricant is used to effect a completely leak tight seal. When pressure is applied to the valve in the closed position, the parallel plug is forced to the downstream side of the valve. The metal to metal contact of plug and body together with the barrier of sealing lubricant ensures a completely leak tight valve, with the sealant also acting as a lubricant and providing a barrier to reduce corrosion to the plug and body.
Specification
Screwed end valves are supplied to ANSI B1.20.1.
Flanged valves are supplied with flanges to ANSI B16.1, Class 125.
Flanged valves face dimensions are in accordance with ANSI B16.10, short pattern
170M/171M - 200M/201M are CSA/CGA 3.11 Approved (1/2'' - 8'')
Cast Iron Rectangular Port / Full Bore
200M/201M - 1/2'' - 4'' (Wrench Operated)
201MG - 6'' - 8'' (Gear Operated)
Gearing
The Milliken plug valves are available with gear operator options. In this catalogue, we have indicated in the dimensions tables, which valves are fitted with gear operators.
Routine Maintenance
The only maintenance required on plug valves is periodic re-lubrication with valve sealant. Frequency of lubrication should be established for each specific service since requirements will vary widely with temperature, pressure, service fluid and frequency of operation.
Lubricant / Sealant Options
A wide variety of lubricants are available for many different service applications such as oil, asphalt and gases. Most lubricants are available in stick and cartridge form. An economical alternative to removing a valve from the line or disassembling and cleaning, valve cleaner is available to dissolve hardened debris within the sealant system
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