Description
YOUYAN QJH-25WL High Pressure Hydraulic Ball Valve
Technical Specifications Model: QJH-25WL Nominal Diameter: DN25 Connection Type: Threaded connection Working Medium: Hydraulic oil Valve Body Material: Stainless steel Sealing Material: High pressure resistant elastomer seal ring Operation Mode: Manual rotary handle Nominal Working Pressure: High pressure hydraulic rating Operating Temperature: -20 ℃ ~ +80 ℃ Mounting Method: Pipeline threaded installation
Functional Features Manual rotary handle controls ball core to open or close hydraulic oil passage. Metal ball core with precision machining provides reliable sealing under high hydraulic pressure. Stainless steel valve body has strong corrosion resistance for long service life. Seal ring structure prevents hydraulic oil leakage at high pressure working state. Quick switch operation, 90-degree rotation completes opening or closing action. Compact structure, small installation space occupation. Bidirectional flow can be cut off when valve is in closed state.
Application Scenarios Hydraulic station pipeline isolation, engineering machinery hydraulic oil circuit shut-off, power plant hydraulic control system, metallurgy heavy equipment hydraulic pipeline, offshore auxiliary hydraulic pipeline.
Performance Parameters Maintain zero leakage sealing performance at rated high working pressure. Ball core can switch smoothly between open and closed state under rated pressure. Stainless steel valve body resists hydraulic oil corrosion and medium erosion. Seal ring keeps sealing performance under repeated switch cycles. Valve body withstands specified pressure impact without permanent deformation. Manual handle provides enough operating torque for valve switching.
Material Composition Valve Body: Stainless steel. Ball Core: Precision machined stainless steel sphere. Sealing Elements: High pressure resistant nitrile or fluorine rubber seal rings. Handle: Steel handle with anti-slip surface treatment. Fasteners: Stainless steel fixing bolts. Threaded Connector: Integral stainless steel threaded port.
Structural Features Integral forged stainless steel valve body with threaded inlet and outlet ports. Spherical ball core installed inside valve body flow passage. Seal rings installed between ball core and valve body inner surface. Manual handle mounted on valve stem, valve stem connects to internal ball core. 90-degree rotation mechanical limit structure limits handle rotation angle. Compact valve body structure reduces pipeline installation space.
Working Principle When manual handle rotates to open position, the through hole on spherical ball core aligns with valve body pipeline passage, hydraulic oil flows freely through valve. When handle rotates 90 degrees to closed position, solid part of ball core blocks pipeline passage, cutting off hydraulic oil flow. Elastic seal rings tightly fit ball core surface to prevent hydraulic oil leakage under high pressure. The mechanical limit structure restricts handle rotation angle to prevent over rotation damage of internal ball core and sealing parts.
Installation Requirements Clean pipeline internal debris before valve installation to avoid scratching sealing surface. Screw threaded port of valve onto hydraulic pipeline thread, apply proper thread sealant. Install valve in accessible position for manual handle operation. Keep valve handle rotation path free from surrounding mechanical obstruction. Complete pipeline pressure test after valve installation. Confirm open and closed position marking on handle after installation.
Usage Precautions Clean pipeline before commissioning, solid particles damage ball core and seal ring. Do not apply excessive torque on manual handle to avoid valve stem deformation. Check external oil leakage regularly during operation. Replace seal ring immediately when oil leakage appears at sealing position. Avoid frequent switching under maximum impact pressure. Do not disassemble valve body under pressurized pipeline state. Drain hydraulic pressure inside pipeline before valve maintenance and disassembly.
