D643H pneumatic hard seal butterfly valve

First, pneumatic hard seal butterfly valve product overview

The pneumatic hard seal butterfly valve structure of Xuan Cheng company is composed of quality pneumatic actuators and three-dimensional core hard seal butterfly valves, which can also be called pneumatic three-eccentric butterfly valves. The valve seat adopts the multi-level structure of hard seal compatibility, exquisite processing and advanced technology. Pneumatic metal seal butterfly valve and electrical valve positioner supporting, input 4 ~ 20mADC signal and 0.4 ~ 0.7MPa air source can control the operation, can achieve the pressure, flow, temperature, liquid level and other parameters of the adjustment. Pneumatic hard seal butterfly valve with travel limit switch, solenoid valve, pressure reducing valve and 0.4-0.7MPa air source can realize switching operation, and send two pairs of passive contact signal indicating the switch of the valve. Pneumatic hard seal butterfly valve is composed of valve body, butterfly plate, multi-level valve seat, stem, transmission mechanism and other main components, simple structure, small size, light weight, so pneumatic metal seal butterfly valve is widely used in metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage and other corrosive media pipelines.

Second, pneumatic hard seal butterfly valve product characteristics

(1) The pneumatic metal seal butterfly valve adopts a three-eccentric sealing structure, the seat and the butterfly plate are almost no wear, and the sealing function is more and more tight.
(2) The sealing ring is made of stainless steel, with the double advantages of metal hard seal and elastic seal, regardless of low temperature and high temperature, it has excellent sealing performance, corrosion resistance, long service life and other characteristics.
(3) The sealing surface of the butterfly plate is surfacing cobalt-based cemented carbide, which is wear-resistant and has a long service life.
(4) Large specifications of the butterfly plate quilted structure, high strength, large flow area, small flow resistance.
(5) The pneumatic three-eccentric butterfly valve has a bi-directional sealing function, which is not limited by the flow direction of the medium during installation and is not affected by the spatial position, and can be installed in any direction.
(6) The pneumatic device can be installed in multiple stations (rotation 90° or 180°), which is easy for users to use.

Three, the main design standards of pneumatic hard seal butterfly valve

Design standard	GB/T12238-1989
Flange connection dimensions	GB/T9113.1-2000; GB/T9115.1-2000; JB78
Structural length	GB/T12221-1989
Pressure test	GB/T13927-2000; JB/T9092-1999

Four, pneumatic hard seal butterfly valve actuator technical parameters

Nominal diameter DN(mm)	DN50 to 1000mm	Actuator type number	GT, AT, AW series single and double acting pneumatic actuator
Nominal pressure (MPa)	PN1.0, 1.6, 2.5MPa	Air supply pressure	0.4 to 0.7MPa
Body form	Straight through casting body	Air source connector	G1/4", G1/8", G3/8", G1/2"
Connection form	Flange type, sandwich type	Ambient temperature	-30 to +70 ° C
Spool form	Butterfly plate	Mode of action	Single acting actuator, double acting actuator
Sealing packing	Flexible graphite, tef-lon	Accessories available	Positioner, solenoid valve, air filter pressure reducer, holding valve, stroke switch, valve position transmitter, handwheel mechanism, etc
Flow characteristics	Approximate equal percentage, straightness	Using a new type of pneumatic actuator, double acting and single acting (spring return), rack and pinion drive, safe and reliable; Large diameter valve adopts series AW type pneumatic actuator fork type transmission, reasonable structure, large output force, double acting and single acting. 1, gear type double piston, output torque is large, small volume. 2, cylinder selection of aluminum gold material, light weight, beautiful appearance. 3. Manual operation mechanism can be installed at the top and bottom. 4, rack type connection can adjust the opening Angle, rated flow. 5, the actuator can choose live signal feedback indication and accessories to achieve automatic operation. 6. IS05211 standard connection provides convenience for the installation and replacement of the product. 7, both ends of the adjustable screw can make the standard product in 0° and 90° have a ±4° adjustable range. Ensure the synchronization accuracy with the valve.
Range of action	0 to 90°
Leakage Q	Meets ANSI B16.104 Level IV standards
Applicable temperature	Hard seal ≤450ºC
Basic error	With positioner: less than ±2% of the full stroke
Return difference	With positioner: less than 2% of full trip
Adjustable range	50:1
Configuring the actuator	GT, AT, AW series single and double acting pneumatic actuators
Control mode	Switch two position control, 4-20mA analog control

Five, pneumatic hard seal butterfly valve main parts materials

Inquire Now Next Product