Butterfly valve: this kind of valve should be lugs or international standards for pipeline I. P。 年代。 Tubular connection body, and according to the standardization association MSS - valves and pipe fittings manufacturers SP67 standard manufacturing; Size (~ 12 rated working pressure is 200 psi impact not cold water, DN350 is more than 150 psi. Used as insulation heat preservation and heat insulation of the body with 2 inches longer diameter, material is cast iron or ductile iron. Butterfly plate is aluminum bronze alloy, configuration buna - N and seating; Or buna N the butterfly plate coating with polymer coating on the body. Stem should be 400 series stainless steel, can not stem exposed on the butterfly plate fasteners. Size DN65 to 6 should be configured with ten operating handle position orifice plate; Path DN200 over the butterfly valves shall be equipped with gear operators. Lug butterfly valve structure and slot structure should be used as isolation valve, and there's no need to lower flange can be under full pressure in the pipe end. Handle valve operation should apply to lock in the open or closed position. The valve can be used: lug body, electroplating of nodular cast iron butterfly plate nibco LD3110 - Three butterfly Industrial Valves ( Handle operator) ; LD3110 - 5 butterfly valve ( Gear operator) 。 Lug body, aluminum bronze butterfly plate the nibco LD2100 - Three butterfly valve ( Handle operator) ; LD2100 - 5 butterfly valve ( Gear operator) 。 A tubular body, the rubber coating nibco GD4775 - butterfly plate Three butterfly valve ( Handle operator) ; GD4775 - 5 butterfly valve ( Gear operator) 。 The check valve: ( Note: if the air compressor is reciprocating type, check valves should be located in accept downstream groove. ) Size DN65 above the check Industrial Valves shall utilize plate type ( The wafer) Structure and configuration of stainless steel spring, bronze disc plate, buna - N the seat, conforms to the American society of testing materials standard ASTM A 126 class B or A 48 standard cast iron valve body, the configuration class 125 or class 150 flanges.
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