Q641H, Q641Y Pneumatic High Temperature Ball Valve
The Q641H/Y pneumatic high-temperature ball valve consists of a metal hard-seal ball valve and a piston-type pneumatic actuator. The sealing surface uses a metal hard-seal valve seat, suitable for media with a temperature ≤500°C. The pneumatic high-temperature ball valve can be equipped with a valve positioner to input control signals (4-20mA DC or 1-5V DC) and a pneumatic power source for operation. It can also be equipped with a travel limit switch, solenoid valve, pressure reducing valve, and a 0.4～0.7MPa pneumatic power source to achieve on/off operation, and sends out two pairs of passive contact signals to indicate the valve’s opening and closing. The pneumatic high-temperature ball valve as a whole has advantages such as compact structure, small size, reliable operation, good sealing performance, easy maintenance, convenient installation, and strong adaptability.Especially suitable for applications involving viscous, particulate, or fibrous media. Pneumatic high-temperature ball valves are widely used in industrial automatic control systems in petroleum, chemical, educational equipment, light industry, high-pressure equipment, pharmaceutical, and papermaking industries for remote centralized or local control.
Product Name: Pneumatic High-Temperature Ball Valve
Product Model: Q641H/Y
Nominal Diameter: DN15～DN300
Structure: Spherical
Nominal Pressure: 1.6Mpa～16.0Mpa
Connection Method: Flange, Wafer, Internal Thread, Welding
Applicable Temperature: ≤550ºC
Actuation Method: Pneumatic (Manual Operation Available)
Valve Body Material: Cast Steel, Stainless Steel
Manufacturing Standard: GB (Chinese National Standard), DIN (German Standard), API (American Standard), ANSI (American Standard)
Applicable Media: Water, Oil, Gas, Liquid
Manufacturer:Zhejiang Kozo Valve Co., Ltd.
Main Technical Parameters and Performance
Nominal Diameter DN (mm): 15～300
Actuator Model: GT, AT, AW series single/double-acting pneumatic actuators
Nominal Pressure (MPa): PN1.6, 2.5, 4.0, 6.4; 10.0, 16.0, MPa
Supply Pressure: 0.4～0.7MPa
Valve Body Type: Two-stage cast ball valve
Air Source Interface: G1/4″, G1/8″, G3/8″, G1/2″
Connection Type: Flanged, Welded
Ambient Temperature: -30～+70℃
Valve Core Type: “O” type ball valve core
Actuation Type: Single-acting actuator, double-acting actuator
Sealing Packing: Flexible graphite, spiral wound gasket
Optional Accessories: Positioner, solenoid valve, air filter regulator, position holding valve, limit switch, valve position transmitter, handwheel mechanism, etc.
Flow Characteristics: Approximately quick-opening type Utilizing a new type of pneumatic actuator, available in double-acting and single-acting (spring return) versions, with gear and rack drive for safety and reliability; large-diameter valves employ the AW series pneumatic actuator with a fork-type drive, featuring a reasonable structure, high output force, and available in double-acting and single-acting versions.
1. Gear-type double piston design, high output torque, and compact size.
2. Cylinder made of aluminum alloy, lightweight and aesthetically pleasing.
3. Manual operating mechanisms can be installed at the top or bottom.
4. Rack-and-pinion connection allows for adjustment of opening angle and rated flow rate.
5. Actuators can be optionally equipped with electrical signal feedback indicators and accessories for automated operation.
6. ISO5211 standard connection facilitates product installation and replacement.
7. Adjustable screws at both ends allow for ±4° adjustment range between 0° and 90° for standard products, ensuring synchronization accuracy with the valve.
Operating range: 0～90°
Leakage Q: According to GB/T4213-92, less than 0.01% of rated KV
Applicable temperature: PPL≤300℃, hard seal≤450℃
Basic error: With positioner: less than ±2% of full stroke
Dead zone: With positioner: less than 2% of full stroke
Adjustable range: 250:1
Actuator configuration: GT, AT, AW series single and double acting pneumatic actuators
Control method: Two-position switch control, 4-20mA analog control
Q641H, Q641Y Pneumatic High Temperature Ball Valve Main Design Standards
Design and Manufacturing: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357
Flange Dimensions: JB/T74～90, GB9112～9131, HGJ44～76, SH3406, ANSI B16.5, JIS B2212～2214, DIN2543
Structural Length: GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202
Inspection and Testing: JB/T 9092, API 598, GB/T13927
Main Component Materials
Q641H, Q641Y Pneumatic High Temperature Ball Valve Component Name Material Name
Valve Body: WCB 304(CF8), 316(CF8M), 316L(CF3M)
Ball: 2Cr13 + Nitrided, 304 316 316L
Valve Stem: 2Cr13 304 316 316L
Sealing Ring: Reinforced PTFE (PPL), Para-Polystyrene, Stainless Steel Sealing Ring
Applicable Media: Water, Gas, Steam, Oil, etc.; Corrosive Media such as Nitric Acid; Corrosive Media such as Acetic Acid; Corrosive Media such as Urea
