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Q41H Three-Piece Forged Steel Flange Ball Valve

Q41H Three-Piece Forged Steel Flange Ball Valve

  • Model:Q41H-16C/Q41H-25C/Q41H-40C/Q41H-64C/Q41H-16P/Q41H-25P/Q41H-40P/Q41H-64P/Q41H-16R/Q41H-25R/Q41H-40R/Q41H-64R
  • Specification:DN15-DN200
  • Temperature:-196~450℃
  • Medium:Water, gas, oil products, natural gas, and acid-alkali corrosive media
  • Pressure:PN16-PN64
  • Connection method:flange
  • Driving method: Manual
  • Material:Forged steel, forged stainless steel
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Q41H Three-Piece Forged Steel Flange Ball ValveOverview

Q41H Three-Piece Forged Steel Flange Ball Valve Overview    

Q41H Three-Piece Forged Steel Flange Ball Valve is a high-performance industrial ball valve featuring an integrally forged steel body and a three-piece bolted connection structure. The valve body is composed of high-strength forged steel segments (e.g., A105), joined together by alloy steel bolts, with an internally designed metal hard-seal system. The valve operates via a 90-degree rotation of the stem, which drives the precision-machined ball to open or close. It is specifically engineered for high-pressure, high-temperature, and demanding media conditions. The modular three-piece structure facilitates disassembly and maintenance, making it widely applicable in critical systems such as petrochemicals, natural gas, power plants, and high-pressure pipelines. This valve serves as a premium equipment solution for reliable shut-off and in-line maintenance capabilities.

Q41H Three-Piece Forged Steel Flange Ball Valve Product Image


Q41H Three-Piece Forged Steel Flange Ball ValveCharacteristic

Q41H Three-Piece Forged Steel Flange Ball Valve Features

1. Forged Steel Three-Piece High-Pressure Structure:  

  The valve body is made of segmented forged steel, offering high strength and pressure resistance. The three-piece bolted connection design allows for internal inspection and seal replacement without removing the valve from the pipeline, significantly simplifying maintenance.

2. Metal Hard Seal for Demanding Conditions:  

  The ball and seat feature hard alloy overlay sealing surfaces, providing excellent resistance to high temperatures, wear, and erosion. This makes the valve suitable for harsh applications involving particulate media and frequent operation.

3. Fire-Safe and Bidirectional Sealing:  

  The valve typically complies with fire safety standards such as API 607, ensuring basic sealing performance through metal-to-metal sealing in the event of auxiliary soft seal failure. Most designs also offer reliable bidirectional sealing capability.

4. Stable Operation and Low Maintenance Costs:  

  The fixed ball design ensures low and stable operating torque. The three-piece structure greatly simplifies maintenance procedures, significantly reducing downtime and lifecycle maintenance costs.

5. Standardization and High Reliability:  

  Designed and manufactured in accordance with high standards such as API 6D, the valve is suitable for high-temperature, high-pressure, and corrosive media applications, providing highly reliable shut-off performance in critical industrial processes.

Q41H Three-Piece Forged Steel Flange Ball Valvestructure principle

Q41H Three-Piece Forged Steel Flange Ball Valve Structure Diagram


Parts Name Material List

序 号NO.名称Name材料Material
1阀体bodyForged steel, forged stainless steel
2球体ballSS410或SS316
3密封垫seal gasketRPTFE
4填料packingRPTFE
5阀杆stemA276 410或SS316


Q41H Three-Piece Forged Steel Flange Ball Valvetechnology parameter

Performance Specification Table

性能规范表Performance Specification Table
公称压力Nominal Pressure (PN)1.6/2.5/4.0/6.4MPa
强度试验压力Strength Test Pressure2.4/3.75/6/9.6
密封试验压力Seal Test Pressure1.76/2.75/4.4/7.04
适用温度Suitable Temperature Range-196~450


Q41H Three-Piece Forged Steel Flange Ball Valvestandard size

Q41H Three-Piece Forged Steel Flange Ball Valve Overall Dimension Drawing


Q41H Three-Piece Forged Steel Flange Ball Valve Overall Dimension Table

公称通经DN尺寸size(mm)
Ld1L1DD1D2bZ-φdH
mmin全通 经F P缩经 FP全通 经F P缩经 FP全通 经F P缩经 FPQA4 1QA3 41QA6 41QA9 41
151/2"13015956545144-1462200
203/4"140201057555144-1468204
251"150251128565144-1475215360
3211/ 4"165-3213510078164-1485240390
4011/ 2"182-4014511085164-1895264395
502"200-50--160125100164-18110360472
6521/ 2"220-65-180145120184-18130379530
803"25080-195160135204-18155452580
1004"280100215180155208-18180320479630
1255"320125245210185228-18250380646710
1506"360150280240210248-23275400666670
2008"4002003352952652612-23330450815825