Valvola a sfera pneumatica Q641F API USA

Pneumatic ball valves have advantages such as compact structure, piccola dimensione, funzionamento affidabile, low flow resistance coefficient, buone prestazioni di tenuta, facile manutenzione, installazione conveniente, e forte adattabilità.

The Q641F/H pneumatic ball valve consists of a high-precision pneumatic actuator and a precision-cast ball valve. It is mainly divided into two categories: pneumatic soft-seal ball valves (≤200°) and pneumatic hard-seal ball valves (≤550°). Pneumatic ball valves have advantages such as compact structure, piccola dimensione, funzionamento affidabile, low flow resistance coefficient, buone prestazioni di tenuta, facile manutenzione, installazione conveniente, e forte adattabilità. Pneumatic ball valves can be equipped with travel limit switches, solenoid valves, pressure reducing valves, and a 0.4-0.7MPa air source to achieve on/off operation, and send two pairs of passive contact signals to indicate the valve’s opening and closing. Pneumatic flange ball valves are particularly suitable for applications involving viscous, particolato, o mezzi fibrosi. Pneumatic ball valves are widely used in industrial automatic control systems in petroleum, chimico, attrezzature educative, industria leggera, apparecchiature ad alta pressione, farmaceutico, and papermaking industries for remote centralized control or local control.

Nome del prodotto: Pneumatic Ball Valve

Modello del prodotto: Q641F/H
Diametro nominale: DN15～DN400
Struttura: Sferico

Pressione nominale: 1.6Mpa~32.0Mpa
Metodo di connessione: Flangia, Wafer, Threaded, Saldato

Temperatura applicabile: ≤550ºC
Metodo di attuazione: Pneumatico (manual operation also available)

Materiale del corpo valvola: Acciaio fuso, Acciaio inossidabile
Norma di produzione: GB (Standard nazionale cinese), DA (Norma tedesca), API (Norma americana), ANSI (Norma americana)

Supporti applicabili: Acqua, Olio, Gas, Liquido
Produttore: Zhejiang Kozo Valve Co., Ltd.

Q641F Pneumatic Ball Valve US API Product Features

(1) Bassa resistenza ai fluidi: Le valvole a sfera hanno la resistenza ai fluidi più bassa tra tutti i tipi di valvole. Even reduced-bore ball valves have very low fluid resistance.

(2) Thrust bearings reduce stem friction torque, ensuring balanced and flexible operation of the stem over long periods.

(3) Excellent seat sealing performance: The sealing rings, made of materials such as PTFE, are easy to seal, and the sealing capacity of the ball valve increases with increasing medium pressure.

(4) Reliable stem sealing: Because the stem only rotates and does not move up or down, the stem packing seal is not easily damaged, and the sealing capacity increases with increasing medium pressure.

(5) Due to the good self-lubricating properties of materials such as PTFE, friction loss with the ball is low, extending the service life of the ball valve.

(6) The bottom-mounted stem and the raised step on the stem head prevent the stem from being ejected. If a fire causes damage to the stem seal, the raised step can still form metal-to-metal contact with the valve body, ensuring the stem seal.

Technical Parameters
Diametro Nominale DN (mm): 15 20 25 32 40 50 65 80 100 125 150 200
Rated Flow Coefficient KV: 21 38 72 112 170 273 384 512 940 1452 2222 3589
Pressione nominale (MPa): PN1.6, 2.5, 4.0, 6.4 MPa; ANSI 150, 300LB
Allowable Differential Pressure (MPa): ≤Nominal Pressure
Tipo di corpo valvola: Valvola a sfera in fusione a due stadi
Tipo di connessione: Flangiato, welded, threaded
Tipo di nucleo della valvola: “O” tipo nucleo della valvola a sfera
Sigillatura dell'imballaggio: V-type PTFE packing, flexible graphite packing, ecc.
Caratteristiche del flusso: Approximately quick-opening type
Operating Range: 0~90°
Leakage Q According to GB/T4213-92, meno di 0.01% di KV nominale
Gamma regolabile: 250:1 350:1
Configuration actuator: Compatible with GT, SR, ST, A, AW series pneumatic actuators
Metodo di controllo: Tipo acceso/spento (two-position on/off control), regulating type (4～20mA control)
Actuator parameters:
Actuator model: GT, A, AR, AW series single and double-acting pneumatic actuators
Air supply pressure: 0.4~0.7MPa
Air source interface: G1/4″, G1/8″, G3/8″, G1/2″
Ambient temperature: -30～+70℃
Action type: Attuatore a semplice effetto: Air-to-close (B) — valve position open (FO) when air is lost; Air-to-open (K) — valve position closed (FC) when air is lost
Double-acting actuator: Air-to-close (B) — valve position held (FL) when air is lost; Air-to-open (K) — Valve Position Holding (FL) in case of air loss. Optional accessories include positioners, solenoid valves, air filter regulators, position holding valves, limit switches, valve position transmitters, and handwheel mechanisms.

Part Materials
Nome parte Materiale
Corpo valvola WCB 304(CF8) 316(CF8M) 316l(CF3M)
Ball 2Cr13 + Nitrurato 304 316 316l
Stelo della valvola 2Cr13 304 316 316l
Valve Seat Seal PTFE (Polytetrafluoroethylene), PPL (Polyphenylene PLC), Metal Seal (Hard Alloy)
Packaging V-type PTFE packing, Flexible Graphite