D673h Pneumatic Hard Seal Butterfly Valve

• Media: Water Vapor Oils
• Driving Mode: Electromanual Pneumatic
• Connection Form: Flange Welding
• Structure: Three-Eccentric Sealing
• Seal Form: Supercharging Pressured Sealed
• Valve Stem: Normal
• Model NO.: D673H
• Work Pressure: Mid-Pressure (2.5mpa< Pn <6.4mpa)
• Working Temperature: Medium Temperature (120°C<T<450°C)
• Material of Seal Surface: Metal Hard Sealed
• Valve Body: Sheet Metal
• Standard: National Standard
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Transport Package: Wooden Box
• Specification: DN50-DN2400
• Trademark: xc
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000

Product Description

Product Name:	Pneumatic clamp type hard seal butterfly valve	Product Model:	D673H
Nominal diameter:	DN50 to DN1000	Seat seal:	Alloy, Stellite, stainless steel
Nominal pressure:	1.0Mpa to 4.0MPa	Connection method:	Pair clip, flange
Applicable temperature:	-20ºC ~ +150ºC ~ 425ºC	Drive mode:	Manual, worm gear, electric, pneumatic
Body material:	Cast steel, stainless steel	Manufacturing standard:	GB, German DIN, American API, ANSI
Applicable media:	Water, oil, steam, gas, powder, liquid	Manufacturer:	Xuan Cheng Valve Co., LTD

Product Description

D673H pneumatic clamp type hard seal butterfly valve adopts a "U" type stainless steel seal ring, the precision elastic seal ring with the polished butterfly plate three-dimensional eccentric contact. It solves the problem that the sealing surface of the traditional eccentric butterfly valve is still in the sliding contact friction when opening and closing 0° ~ 10°, and realizes the effect that the sealing surface of the butterfly plate is separated when opening and the contact is closed. It achieves the purpose of extending the service life and the best sealing performance. Therefore, it is widely used in the medium temperature ≤550ºC metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage and other corrosive medium pipelines, is the best device to adjust the flow and cut off the fluid.

Product Features

1, the butterfly valve structure is simple, compact, light weight, easy to install and disassemble, convenient maintenance;
2, the butterfly valve adopts stainless steel "U" type sealing ring, has a certain elasticity no matter in the case of high temperature, low temperature, it and the butterfly plate have excellent sealing;
3, the butterfly valve's three-dimensional eccentricity, after strict calculation, "U" type sealing ring and butterfly plate almost no friction, long service life, and has the function of the tighter close;
4, the sealing surface of the butterfly plate adopts surfacing welding cobalt-based cemented carbide, the sealing surface is wear-resistant, long service life;
5, the butterfly valve structure is unique, "switch" only need to turn the stem 90° to complete. The operation is flexible, convenient, labor-saving, not affected by the medium pressure, reliable sealing performance;
High temperature resistance, low temperature resistance, corrosion resistance.

Adopt standard

Design standard :GB/T12238-1989
Structure length :GB/T12221-1989
Pressure test :GB/T13927-1992; JB/T9092-1999

Executive agencies

Using a new series GT type pneumatic actuator, there are double acting and single acting (spring return), gear transmission, safe and reliable; Large diameter valve adopts series AW type pneumatic actuator fork drive, reasonable structure, large output torque, double acting and single acting type
1, gear type double piston, large output torque, 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 various 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.

Attachment option

According to different control and requirements can choose the following accessories:
cut off type accessories: single electronic control solenoid valve, double electronic control solenoid valve, limit switch return signal.
Regulating accessories: electrical positioner, pneumatic positioner, electrical converter.
Air source processing accessories: air filter pressure reducing valve, air source processing triplet.
Manual mechanism: JFSD manual operation mechanism

Technical parameters

Nominal diameter	DN (mm)	50 to 1200
Nominal pressure	PN (MPa)	0.6	1.0	1.6	2.5	4.0
Test pressure	Strength test	0.9	1.5	2.4	3.75	6.0
	Seal test	0.66	1.1	1.76	2.75	4.4
	Gas seal test	0.6	0.6	0.6	0.6	0.6
Applicable medium	Water, steam, oil, acid corrosion, etc.
Applicable temperature	Carbon steel :-29ºC ~ 600ºC Stainless steel -40ºC ~ 600ºC

Material of main parts

Part name	Materials
Body	Cast iron, cast steel, stainless steel, chrome-molybdenum steel, alloy steel
Butterfly plate	Cast steel, alloy steel (hard chrome plated), stainless steel, chrome molybdenum steel
Sealing ring	Stainless steel, polyolactone, anti-wear material
Valve stem	2Cr13, 1Cr13 stainless steel, chrome molybdenum steel
Stuffing	Flexible graphite

Three eccentric characteristics and principle

1, deviate from the center of the pipeline
2, deviate from the center of the sealing surface
3, inclined cone
when the valve is opened, the butterfly plate and the valve seat in close instant contact, the use of the butterfly plate eccentric 1, eccentric 2 quickly out of the valve seat, reduce the wear of the sealing pair, friction torque is small, open flexible. Eccentric cone 3, so that when the valve is opened or closed, the butterfly plate can pass through the valve seat hole to achieve contact sealing. In addition, the rotation radius of the conical butterfly plate is greater than the rotation radius of the contact position of the sealing pair, so the butterfly plate will be more and more tightly closed when the valve is closed, which can realize self-locking and prevent the butterfly plate from overpositioning.
Outline structure diagram