ZZY Series Self-operated Pressure Regulating Valve-Contro Valve-Zhejiang Zhongyuan Automation Equipment Co., Ltd. | Control Valves/Pneumatic Actuators Manufacturer

ZZY Series Self-operated Pressure Regulating Valve

· Compact structure with S-shaped flow path and low pressure drop

· Wide adjustable range and high-precision flow characteristics

· Excellent dynamic stability, low noise, and anti-cavitation design

· Large spool guide area enhances vibration resistance

· Complies with GB/T4213-2008 standard

· Suitable for high-temperature and low-temperature fluid control

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Product Details

Plug type	Single-seated (ZZYP), Cage-guided (ZZYM), Double-seated (ZZYN)
Function type	Pressure reducing (Type B) and pressure relief (Type K)
Nominal diameter	DN15mm-300mm (1/2" - 12")
Flow characteristics	Quick opening
Regulation accuracy	±3-10%
Temperature limit	≤350℃
Pressure reduction ratio	Max 10, Min 1.25
Internals material	Standard material combinations, refer to Table 1 and Figure 1 for temperature/pressure range and leakage class
Nominal pressure	PN Series: 1.6,2.5,4.0,6.3,10.0MPa Class Series: Class150,300,600
Connections	Flanged, Welded, Threaded
Flange standard	PN1.6MPa: GB/T9113.1 steel flange PN4.0/6.3/10.0MPa: GB/T9113.2 steel flange
Sealing face	PN1.6MPa: Raised face (RF) PN4.0/6.3/10.0MPa: Flat face (F)
Face-to-face	Per GB12221-2005
Body/bonnet material	WCB, WC9, CF8, CF8M
Actuator type	Diaphragm, Piston, Bellows
Packing	PTFE, Flexible graphite
Surface coating	Light coffee (Epoxy resin). No coating for stainless steel body.

Special inspection	Flow characteristics test, Material inspection (Test report)
Cleaning requirements	Cleanliness requirements, Oil-free, Dehydration treatment
Special specifications	Sand/dust-proof type, Salt corrosion-resistant type, Arctic version, Tropical version, Copper-free, Stainless steel bolts/nuts for atmospheric exposure, Specified coating color
Accessory requirements	Special interfaces, Pressure tap piping included, With pressure gauge
Special media	Oxygen