Description
The Valve shall be adjustable, direct operated, packless,
diaphragm actuated, balanced and single seated.The valve shall
close tight on dead end shutoff and shall maintain a discharge
pressure which will not vary more than 1 psig for each 10 psig
inlet pressure variation. Delivery pressure variations from zero
flow to rated flow shall not exceed 15% of the maximum spring
pressure rating. The valve shall be suitable for 200°F service
temperature.
Valve body shall be cast iron. Sizes 2-1/2″ and larger shall have
flanged ends. Trim shall be stainless steel. Valve shall be
equipped with a reversible composition disc and diaphragms and
discs shall be nitrile. All working parts shall be easily accessible
without removal of valve from the line.