Pneumatic diaphragm sleeve control valve

[Standard technical parameter]

Body type: single seat, two seat, sleeve pneumatic film sleeve control valve

Nominal diameter: DN20-DN200

Nominal pressure: ANSI150, 300, 600LB, JIS10, 16, 20, 30, 40K, PN1.6, 2.5, 4, 6.4MPa

Connection: flange: FF, RF, RJ and LG

Flange standards: ANSI, B16.5, JIS, B2201, JB/T79.1, PN1.6MPa, JB/T79.2 thread: DIN, NPT, RC, BSP, G and other welding: GB12224-89

Sealing surface form: PN16 convex, PN40, PN63, PN100 concave

Material: WCB, 304, 316, 316L

Upper valve cover: standard type (-20~+200℃), low temperature type (-60~ -196℃), heat dissipation type (-40~ 450℃)

[Valve structure drawing]

[Bellows seal type]

Gland type: press plate type

Packing: V PVC, PTFE flexible graphite fluoride

[Valve assembly]

Spool form: pressure balance type

Spool valve seat: two seat plunger valve, metal seal, such as percentage characteristics and linear characteristics (LC)

Flow characteristics: equal percentage, linear, quick opening

[Actuating mechanism]

Form: multi spring film actuator

Action form: positive action and reaction

Diaphragm material: NBR rubber clip to strengthen polyester fabric

Spring range: 20 ~ 100KPa, 40 ~ 200KPa, 80 ~ 240KPa,

Air supply pressure: 0.14, 0.16, 0.28, 0.40MPa

[Action form]

Air operated FO (positive acting mechanism), when the gas source fails, the actuator spring opens the valve

Air operated FC (with actuator) when the gas source fails, the actuator spring closes the valve

Accessories (configured as required)

Electrical positioner, air filter relief valve, hand wheel mechanism, limit switch, solenoid valve, retaining valve and other

[Performance]

Rating KV: refer to table

Flow characteristics: linear, equal percentage, quick opening

Adjustable range: 50:1

Leakage level: metal seal: less than 0.01 (ANSI, B16.104-1976IV)

Soft seal: less than 0.00001%

Backlash: less than full range 1% (with locator)

Less than full stroke 3%-5% (without locator)

Basic error: less than full range + 1% (with locator)

Less than full journey + 5% (without locator)

[Valve features]
       Pneumatic diaphragm control valve sleeve with the sleeve guide, pressure balance type double sealing surface and single seal structure, is a force balance valve, the valve has the advantages of compact structure, fluid channel was streamlined S, has the advantages of small pressure drop loss, large circulation, wide adjustable range and high precision flow characteristics. The regulating valve is equipped with a multi spring type film actuator, which has small structure, large output force, and is more suitable for dynamic stability, low noise, cavitation / flash, high and low temperature and high pressure differential fluid control.


[Adaptive condition]
       Widely used in petroleum, chemical industry, gas equipment, nuclear power equipment, water treatment, air conditioning, iron and steel metallurgy, industrial furnace, filling equipment, brewing equipment, drying equipment, vacuum equipment, surface treatment, bio pharmaceutical, food machinery, textile, papermaking and other industries, the preferred product is construction of national defense construction, science and technology.