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هوائي النمط الإيطالي الكرة صمام

PNEUMATIC DIAPHRAGM CUT-OFF VALVE

هوائي النمط الإيطالي الكرة صمام

Gland Form: Bolt pressing type
Plug Form: Single seat valve
Size: 3/4″~8″
Nominal Pressure: PN1.6, 2.5, 4.0, 6.4MPa
Sealing Packing: V type PTFE packing
Using Medium: Steam, water, oil, gas
Temperature Control Range: 0 ~ 250°C

إقتبس

نظرة عامة على المنتج

The pneumatic diaphragm cut-off valve is subject to a top guide structure with multi spring diaphragm actuator. There are three types of valve body structure: single seat, sleeve, and three-way. It has the advantages of compact structure, light weight, sensitive action, S streamlined fluid passage, small pressure drop loss, large valve capacity, convenient disassembly and assembly, etc. The valve receives the signal from the regulating instrument, cuts off, opens or changes the flow direction of the fluid to achieve the automatic control of the process parameters such as pressure, flow, temperature, or liquid level. It is widely used in the automatic control and remote control system of production processes of environmental protection, water treatment, petroleum, chemical industry, metallurgy, electric power, light industry, textile, and other industrial sectors.

 

Model Preparation

ZActuator
Z series
shut-off valve		H: Pneumatic piston actuator
J: Pneumatic film actuator
R: Electric 3410L actuator
D: Electric PSL actuator
HStructural Style
Q Shut-off valveP: Standard single seat shut-off valve
PF: Soft seal single seat shut-off valve
PG: Single seat shut-off valve with heat dissipation
PV: Bellows type single seat shut-off valve
PD: Low temperature single seat shut-off valve
M: Standard type sleeve cut-off valve
MF: Soft seal sleeve cut-off valve
MG: Sleeve shut-off valve with heat dissipation
MV: Bellows type sleeve cut-off valve
MD: Low temperature sleeve shut-off valve

مواصفات المنتج

  • The overall height of the valve can be reduced by about 30%; and the weight can be reduced by about 30%.
  • The valve body is designed as a low flow resistance passage with constant cross section according to the fluid mechanics principle; and its rated flow coefficient increases by 30%.
  • There are soft and hard two kinds of sealing forms. PTFE or PPPs are used for soft sealing. Hard sealing is overlaid with hard alloy. The sealing performance is better.
  • Balanced valve trim improves the allowable pressure difference of cut-off valve.

معلمات المواصفات

Part material

BodyZG230~450, ZG1Cr18Ni9Ti, ZGCr18Ni12Mo2Ti
Plug1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Seat1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Stem1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Actuator MaterialA3, 1Cr18Ni9Ti
PackingPTFE, Flexible graphite
DiaphragmNitrile rubber, Oil-resistant rubber, Fluorine rubber

 

Technical Parameters

DN (mm) / NPS (in)20 / 3/4″25 / 1″32 / 1-1/4″40 / 1-1/2″50 / 2″65 / 2-1/2″80 / 3″100 / 4″125 / 5″150 / 6″200 / 8″
Nominal Pressure (MPa)PN1.6, 2.5, 4.0, 6.4
Rated flow
coeffcient		Single Seat (Kv)71120304875120190300480760
Sleeve (Kv)81120304875120190300480760
Tee (Kv)81217294370110165275440690
Rated Travel (mm)81220254060
Effective Piston Area (cm²)1002004006001000
Allowable LeakageHard SealGeneral: 10⁻⁴ valve rated capacity; seal type: single seat: 1.2×10⁻⁷
Soft SealVI Class
Allowable Differential Pressure (MPa)Positive Effect5.092.911.852.181.331.520.990.620.60.690.39
Counter Action6.43.882.472.911.772.031.320.830.80.920.52
Signal Pressure (kPa)0 or 400–600
Bonnet FormThe standard type (-17~+250°C), high temperature (+250~+450°C), low temperature (-40~–196°C), bellows seal type (-40~+350°C)
Gland TypeBolt pressing type
Sealing PackingV type PTFE packing, impregnated PTFE packing, asbestos braided packing, flexible graphite
Plug FormSingle seat valve
Flow CharacteristicsQuick opening characteristic

 

PNEUMATIC-DIAPHRAGM-CUT-OFF-VALVE-Structure

(Single seater, sleeve type)connection dimensions

Nominal Diameter (mm/in)20 / 3/4″25 / 1″32 / 1-1/4″40 / 1-1/2″50 / 2″65 / 2-1/2″80 / 3″100 / 4″125 / 5″150 / 6″200 / 8″
A196232308394498
LPN16150160180200230290310350400480600
H535870758393100110125143170
H1340345370380390475490500765825927

 

(Three way structure)connecting dimensions

Nominal Diameter (mm/in)20 / 3/4″25 / 1″32 / 1-1/4″40 / 1-1/2″50 / 2″65 / 2-1/2″80 / 3″100 / 4″125 / 5″150 / 6″200 / 8″
A196232308394498
LPN16150160180200230290310350400480600
H132132135140150160160170325450495
H1340345370380390475490500765825927

Note: 1.The dimensions in the table are standard data without accessories. The dimensions of accessories are calculated according to the actual configuration. 2. Due to the technical innovation and improvement of the product, the size may change. Please contact the technical department of the Company for the latest information.

تطبيقات المواصفات

The Pneumatic Diaphragm Cut-Off Valve is widely used in industries such as chemical processing, pharmaceuticals, food and beverage, and water treatment. It provides precise flow control and reliable shut-off capabilities for liquids, gases, and steam. Its compact design, high sealing performance, and quick response make it suitable for applications requiring tight control and minimal leakage. The valve is especially advantageous in corrosive and high-temperature environments due to its durable construction and efficient pneumatic actuation.

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