Q641F, Q641FH Pneumatic Flanged Ball Valve
The Q641F/H pneumatic flange 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.
Nome do produto: Pneumatic Flanged Ball Valve
Modelo de produto: Q641F/H
Diâmetro Nominal: DN15～DN400
Tipo de estrutura: Esférico
Pressão Nominal: 1.6Mpa～32.0Mpa
Método de conexão: Flanged, Wafer, Threaded, Welded
Temperatura aplicável: ≤550ºC
Método de atuação: Pneumático (manual operation also possible)
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, Q641FH Pneumatic Flanged Ball Valve Product features
(1) A resistência ao fluido é pequena. The ball valve has the smallest fluid resistance among all valves. Even the reduced diameter ball valve has a very small fluid resistance.
(2) The thrust bearing reduces the friction torque of the valve stem, making the valve stem’s long-term operation balanced and flexible.
(3) The valve seat has good sealing performance, and the sealing ring made of polytetrafluoroethylene and other materials is used. The structure is easy to seal, and the valve sealing capacity of the ball valve increases with the increase of the medium pressure.
(4) The valve stem seal is reliable. Since the valve stem only rotates and does not move up and down, the packing seal of the valve stem is not easily damaged, and the sealing capacity increases with the increase of the pressure of the medium.
(5) Since materials such as polytetrafluoroethylene have good self-lubricating properties, the friction loss with the ball is small, which helps the ball valve have a long service life.
(6) The bottom-mounted valve stem and the convex steps on the valve stem head prevent the valve stem from spraying out. If the valve stem seal is damaged due to fire, metal contact can also be formed between the convex steps and the valve body to ensure the valve stem sealing.
Q641F, Q641FH Pneumatic Flanged Ball Valve Technical parameters
Diâmetro 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
Nominal pressure (MPa) PN1.6, 2.5, 4.0, 6.4 MPa; ANSI 150, 300LB
Diferença de pressão permitida (MPa) ≤ pressão nominal
Valve body type two-stage cast ball valve
Connection form flange type, welding type, threaded type
Forma do núcleo da válvula “O” type spherical valve core
Sealing packing V-type polytetrafluoroethylene packing, flexible graphite packing, etc..
Flow characteristics: Approximate quick-opening type
Faixa de movimento 0~90°
Leakage Q according to GB/T4213-92, menor que 0.01% de KV nominal
Adjustable range 250:1 350:1
Configuration actuator can be equipped with GT, RS, ST, NO, AW and other series of pneumatic actuators
Modo de controle: switch type (controle de interruptor de duas posições), regulating type (4~20mA control)
Q641F, Q641FH Pneumatic Flanged Ball Valve Actuator parameters
Atuador modelo GT, NO, RA, Atuadores pneumáticos de ação simples e dupla série AW
Pressão de fornecimento de ar 0,4~0,7MPa
Interface de fonte de ar G1/4″, G1/8″, G3/8″, G1/2″
Temperatura ambiente -30~+70℃
Forma funcional: atuador de ação simples: tipo fechado a ar (B)–a posição da válvula está aberta (FO) quando o ar se perde; tipo de abertura de ar (K)–a posição da válvula está fechada (FC) quando o ar se perde.
Atuador de dupla ação: tipo de fechamento de ar (B)–a posição da válvula é mantida quando o ar é perdido (Flórida); tipo de abertura de ar (K)–a posição da válvula é mantida quando o ar é perdido (Flórida)
Pode ser equipado com acessórios: posicionador, válvula solenóide, redutor de pressão do filtro de ar, válvula de retenção de posição, interruptor de viagem, transmissor de posição da válvula, mecanismo de volante, etc..
Q641F, Q641FH Pneumatic Flanged Ball Valve Part material
Part name Material
Corpo de válvula WCB 304(CF8) 316(CF8M) 316eu(CF3M)
Tratamento de nitretação esfera 2Cr13+ 304 316 316eu
Haste da válvula 2Cr13 304 316 316eu
Valve seat seal: PTFE (politetrafluoretileno), PPL (para-polyphenylene), metal seal (tungsten carbide)
Filling V-type PTFE PTFE filler, grafite flexível
performance specifications
Diâmetro 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
Sealing test 1.1 1.76 2.75 4.4 7.04
Low pressure air tightness test 0.5～0.7
Applicable media: água, óleo, vapor, nitric acid (temperature ≤ 200°C), acetic acid (temperature ≤ 200°C)
Pneumatic actuator main component materials
Part name Cylinder block End cover Piston Shaft O-ring Indicator shaft Bolt
QW series
AT series aluminum alloy profiles
(hard anodized) die-cast aluminum alloy
(Epoxy resin spray) Die-cast aluminum Steel
(Nickel-phosphorus alloy plating) NBR ABC SUS304
AW series cast steel
(hard anodized) die-cast aluminum steel
(Nickel-phosphorus alloy plating) NBR ABC SUS304
