Válvula de bola neumática Q641F API de EE. UU.
Pneumatic ball valves have advantages such as compact structure, tamaño pequeño, reliable operation, low flow resistance coefficient, good sealing performance, 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, tamaño pequeño, reliable operation, low flow resistance coefficient, good sealing performance, easy maintenance, convenient installation, and strong adaptability. Pneumatic ball valves can be equipped with travel limit switches, solenoid valves, válvulas reductoras de presión, 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, light industry, high-pressure equipment, farmacéutico, and papermaking industries for remote centralized control or local control.
Nombre del producto: Pneumatic Ball Valve
Modelo de producto: Q641F/H
Diámetro nominal: DN15～DN400
Estructura: Esférico
Presión nominal: 1.6MPa~32,0 MPa
Método de conexión: Brida, Oblea, roscado, soldado
Temperatura aplicable: ≤550ºC
Método de actuación: Neumático (manual operation also available)
Material del cuerpo de la válvula: Acero fundido, Acero inoxidable
Estándar de fabricación: ES (Estándar nacional chino), DE (Estándar alemán), API (Estándar americano), ANSI (Estándar americano)
Medios aplicables: Agua, Aceite, Gas, Líquido
Fabricante: Válvula Co. de Zhejiang Kozo., Limitado.
Q641F Pneumatic Ball Valve US API Product Features
(1) Baja resistencia a los fluidos: Las válvulas de bola tienen la resistencia a los fluidos más baja de todos los 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) Sellado fiable del vástago: 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
Diámetro nominal 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
Presión nominal (MPa): PN1.6, 2.5, 4.0, 6.4 MPa; ANSI 150, 300LB
Presión diferencial permitida (MPa): ≤Presión nominal
Valve Body Type: Two-stage cast ball valve
Tipo de conexión: Flanged, welded, threaded
Valve Core Type: “O” type ball valve core
Sealing Packing: Empaquetadura de PTFE tipo V, flexible graphite packing, etc..
Flow Characteristics: Approximately quick-opening type
Rango de operación: 0~90°
Leakage Q According to GB/T4213-92, less than 0.01% of rated KV
Adjustable range: 250:1 350:1
Configuration actuator: Compatible with GT, SR, ST, AT, AW series pneumatic actuators
Control method: On/off type (two-position on/off control), regulating type (4～20mA control)
Actuator parameters:
Actuator model: GT, AT, 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″
Temperatura ambiente: -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
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
Nombre de la pieza Material
Cuerpo de válvula WCB 304(CF8) 316(CF8M) 316l(CF3M)
Ball 2Cr13 + nitrurado 304 316 316l
Vástago de válvula 2Cr13 304 316 316l
Valve Seat Seal PTFE (Polytetrafluoroethylene), PPL (Polyphenylene PLC), Sello metálico (Hard Alloy)
Packaging V-type PTFE packing, Grafito Flexible
Especificaciones de rendimiento
Diámetro nominal DN (milímetros) DN15-300
Nominal Pressure PN (MPa) 1.0 1.6 2.5 4.0 6.4
Test Pressure Strength Test 1.5 2.4 3.75 6.0 9.60
Prueba de sellado 1.1 1.76 2.75 4.4 7.04
Low Pressure Air Tightness Test 0.5～0.7
Medios aplicables Agua, aceite, vapor, ácido nítrico (temperature ≤200℃), ácido acético (temperature ≤200℃)
Main Component Materials of Pneumatic Actuators
Part Name Cylinder Body End Cover Piston Shaft O-ring Indicator Shaft Bolt
QW Series
AT Series Aluminum Alloy Profile
(Hard Anodized) Die-cast Aluminum Alloy
(Epoxy Resin Coating) Die-cast Aluminum Steel
(Nickel-phosphorus Plated) NBR ABC SUS304
AW Series Cast Steel
(Hard Anodized) Die-cast aluminum steel (nickel-phosphorus plated) NBR ABC SUS304
