Válvula de esfera pneumática Q641F API dos EUA

Pneumatic ball valves have advantages such as compact structure, tamanho pequeno, reliable operation, low flow resistance coefficient, bom desempenho de vedação, easy maintenance, convenient installation, and strong adaptability.

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, tamanho pequeno, reliable operation, low flow resistance coefficient, bom desempenho de vedação, easy maintenance, convenient installation, and strong adaptability. 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, particulate, or fibrous media. Pneumatic ball valves are widely used in industrial automatic control systems in petroleum, químico, educational equipment, indústria leve, high-pressure equipment, farmacêutico, and papermaking industries for remote centralized control or local control.

Nome do produto: Pneumatic Ball Valve

Modelo de produto: Q641F/H
Diâmetro Nominal: DN15～DN400
Estrutura: Esférico

Pressão Nominal: 1.6Mpa~32,0Mpa
Método de conexão: Flange, Bolacha, Rosqueado, Soldado

Temperatura aplicável: ≤550ºC
Método de atuação: Pneumático (manual operation also available)

Material do corpo da válvula: Aço fundido, Aço inoxidável
Padrão de Fabricação: GB (Padrão Nacional Chinês), DE (Padrão Alemão), API (Padrão Americano), ANSI (Padrão Americano)

Mídia Aplicável: Água, Óleo, Gás, Líquido
Fabricante: Válvula Co. de Zhejiang Kozo., Ltda.

Q641F Pneumatic Ball Valve US API Product Features

(1) Baixa resistência a fluidos: As válvulas esfera têm a menor resistência a fluidos de todos os tipos de válvulas. 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) Vedação confiável da haste: 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
Nominal Diameter DN (milímetros): 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
Pressão Nominal (MPa): PN1.6, 2.5, 4.0, 6.4 MPa; ANSI 150, 300LB
Allowable Differential Pressure (MPa): ≤Nominal Pressure
Valve Body Type: Two-stage cast ball valve
Tipo de conexão: Flanged, welded, threaded
Valve Core Type: “O” type ball valve core
Sealing Packing: Gaxeta de PTFE tipo V, flexible graphite packing, etc..
Características de Fluxo: Approximately quick-opening type
Operating Range: 0～90°
Leakage Q According to GB/T4213-92, menor que 0.01% de KV nominal
Adjustable range: 250:1 350:1
Configuration actuator: Compatible with GT, RS, ST, NO, AW series pneumatic actuators
Control method: Tipo ligado/desligado (two-position on/off control), tipo regulador (4～20mA control)
Actuator parameters:
Actuator model: GT, NO, RA, 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: Single-acting actuator: Air-to-close (B) — valve position open (FO) when air is lost; Air-to-open (K) — valve position closed (FC) when air is lost
Atuador de dupla ação: Air-to-close (B) — valve position held (Flórida) when air is lost; Air-to-open (K) — Valve Position Holding (Flórida) 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
Part Name Material
Corpo de válvula WCB 304(CF8) 316(CF8M) 316eu(CF3M)
Ball 2Cr13 + Nitrided 304 316 316eu
Valve Stem 2Cr13 304 316 316eu
Valve Seat Seal PTFE (Polytetrafluoroethylene), PPL (Polyphenylene PLC), Selo metálico (Hard Alloy)
Packaging V-type PTFE packing, Flexible Graphite