Pneumatic flange butterfly valve

Material: Ductile iron, stainless steel (304, 316), or carbon steel.
Size Range: DN80 to DN1000
Connection Options: Flanged connections
Working Pressure: PN10, PN16, and PN25.
Sealing Options: Soft seals
Manufacturing Method: Casting or Forging
Applicable Medium: Suitable for water, air, oil

Product Overview

ZSSWY pneumatic hard seal butterfly valve is a metal sealed butterfly valve with a valve seat for a floating disc. It includes an automatic disc-centering feature and adopts a double eccentric rotary design. When the valve is closed, the disc automatically aligns with the center to ensure tight sealing; when opened, it separates quickly from the seat to reduce wear and extend service life.

Product Features

Simple structure
Good sealing performance
Reliable operation
Long service life

Specification Parameters

◇ Specifications and Technical Parameters

DN (mm)	80	100	150	200	250	300	350	400	450	500	600	700	800	900	1000
Rated Flow Coefficient (Kv)	155	245	495	827	1350	1808	2583	3359	4220	5170	7924	10250	12920	17130	20910

Parameter	Value
Nominal Pressure (MPa)	0.6, 1.0, 1.6, 2.5 (150Lb, 300Lb)
Opening Angle	Regulating type: 70° On/Off type: 90°
Signal Pressure (KPa)	20 – 100
Flow Characteristics	Approximately equal percentage
Medium Temperature (°C)	–40°C to 450°C
Connection Type	Wafer type or flange type
Valve Opening Method	Double eccentric rotary
Actuator Type	ZSS piston actuator
Body Material	WCB, 1Cr18Ni9, ZG0Cr18Ni12Mo2Ti
Disc Material	WCB, 1Cr18Ni9, ZG0Cr18Ni12Mo2Ti

Note:

Kv values in the table correspond to 70° opening.
When opened to 90°, the Kv value is approximately 1.5 times that of 70°.

Specification Applications

Water Treatment: Regulates flow in water distribution and treatment facilities.

HVAC Systems: Controls air flow in heating, ventilation, and air conditioning systems.

Chemical Processing: Manages the flow of various chemicals and fluids.

Food and Beverage: Suitable for sanitary applications requiring cleanable and reliable valves.

General Industrial Use: Applicable in various industries for controlling the flow of gases and liquids.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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