Bellows control valve (pneumatic)

Technical Parameters

Product model:ZJHB(P/M)
Nominal diameter: DN25~300mm
Pressure range: PN1.6~6.4MPa
Operating temperature: -40°C~+350°C
Technical standard: IEC534-1-1976
Flange standard: JB/T79-2015
Valve form: straight through cast ball valve
Body material: cast steel (WCB) stainless steel (CF8)
Sealing packing: bellows seal, V-shaped PTFE

Product Details

Product overview
Pneumatic bellows control valve is composed of multi-spring pneumatic membrane actuator and bellows sealingcontrol valvebody. The bellows regulating valve spool adopts the upper guide structure, compact structure, and has an S streamlined flow channel, so that its pressure drop loss is small, the flow rate is large, the adjustable range is wide, the flow characteristics are high, and the upper valve cover adopts bellows sealing structure to ensure the sealing performance. It is suitable for the adjustment of flammable, explosive, volatile, permeable and rare precious metal media. In addition, pneumatic bellows control valves can also be used in vacuum applications.

Performance characteristics
1. The double sealing structure of bellows packing is adopted to achieve better safety and reliability without leakage; A more reasonable material match can be selected according to the temperature or pressure used on site.
2. It is suitable for the adjustment of flammable, explosive, volatile, permeable and rare precious metal media. The double seal of bellows packing can also be used as a regulation on vacuum pipes.

Main connection size

Nominal diameterDN(mm)		20	25	32	40	50	65	80	100	125	150	200
L	PN16/25	181	184	200	222	254	276	298	352	410	451	600
	PN40	194	197	200	235	267	292	317	368	425	473	610
	PN64	206	200	210	251	286	311	337	394	440	508	650
H	PN16/25	52.5	57.5	75	75	85.5	92.5	100	110	142.5	158	170
	PN40	52.5	57.5	75	75	82.5	92.5	100	117.5	150	167.5	187.5
	PN64	65	40	85	85	90	102.5	107.5	125	172.5	195	207.5
H1		365	365	425	430	445	660	680	690	748	740	780
H2		298	298	298	298	298	380	380	380	510	510	510
H3		180	180	180	180	180	236	236	236	310	310	310
L1		289	289	289	289	289	347	347	347	476	476	476
A		282	282	282	282	282	360	360	360	470	470	470
D		220	220	220	220	220	270	270	270	320	320	320

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