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What is the material of Bolts and nuts of Valve Stem?
Bolts and nuts material of valve stem: The stem nut directly bears the axial force of the stem during the opening and closing of the valve, so it must have a certain strength. At the same time, it and the valve stem are threaded transmission, which requires a small friction coefficient, no rust and avoid […]
What is the material of the butterfly valve stem?
Stem material classification: During the opening and closing of the butterfly valve, the valve stem bears the forces of tension, pressure and torsion, and is in direct contact with the medium. At the same time, there is relative frictional movement with the packing. Therefore, the valve stem material must ensure that there is enough at […]
What is the material of the main parts of the butterfly valve?-(2)
Selection of valve sealing material: Sealing surface material: The sealing surface is the most critical working surface of the valve. The quality of the sealing surface is related to the service life of the valve. Generally, the sealing surface material should consider factors such as corrosion resistance, scratch resistance, erosion resistance, and oxidation resistance. Usually […]
What is the material of the main parts of the butterfly valve?-(1)
Selection of butterfly valve parts materials: There are many materials for manufacturing butterfly valves, including ferrous and non-ferrous metals and their alloys of different brands, and various non-metallic materials. The materials for manufacturing valve parts should be selected based on the following factors: 1. Pressure, temperature and characteristics of working medium. 2. The force of […]
Strainer valve introduction and its features
STRAINER VALVE, also known as filter: a device for filtering pretreatment. The filter valve is the filter equipment necessary for the use of hydraulic control valves and precise and easy-to-clog mechanical products. Strainer valve Introduction: STRAINER VALVE, also known as filter: a device for filtering pretreatment. The filter valve is the filter equipment necessary for […]
Daily maintenance and precautions of ball valves
Daily maintenance of ball valve: Long service life and maintenance-free period will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data. When the ball valve is closed, there is still pressurized fluid inside the valve body. Before maintenance: relieve the pipeline pressure and leave the valve in […]
Applicable occasions and operation method of ball valve
Applicable occasions of ball valve: Since the ball valve usually uses rubber, nylon and polytetrafluoroethylene as the seat sealing ring material, its use temperature is limited by the seat sealing ring material. The cut-off effect of the ball valve is accomplished by pressing the metal ball against each other between the plastic valve seats under […]
Hard seal installation method of ball valve
Hard seal installation method of ball valve: 1) Remove the protective covers on both sides of the flange, and rinse and clean with the valve fully opened. 2) Before installation, the whole machine should be tested according to the specified signal (electrical or pneumatic) (to prevent vibration caused by transportation from affecting the performance), and […]
Installation instructions for ball valves
Installation instructions for ball valves: 1. Indoor devices or outdoor applications with protective methods; 2. Outdoor installations are corroded by wind, sand, rain, dew, and sunlight; 3. Have flammable, explosive gas or dust environment; 4. Humid tropical and dry tropical environment; 5. The temperature of the pipeline medium is as high as 450℃; 6. The […]
The parameter and troubleshooting of the ball valve
The parameter level of the ball valve: 1. Nominal pressure or pressure level: PN1.0-32.0MPa, ANSI CLASS 150-900, JIS10-20K; 2. Nominal diameter or caliber: DN6～900, NPS 1/4 ～36; 3. Connection method: flange, butt welding, thread, socket welding, etc.; 4. Applicable temperature: -196℃～540℃; 5. Drive mode: manual, worm gear drive, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage; […]