Application fields of manual clamp ball valve VQ77H-16P The service industries include energy, petrochemicals, metallurgy, chemical engineering, mining, papermaking, environmental protection, biochemistry, pharmaceuticals, petroleum, electricity, printing and dyeing, light industry, food, tobacco, sugar production, beverages and other fields. Introduction to Manual Clamp on Ball Valve VQ77H-16P The V-shaped flange ball valve is a type of ball valve, with a V-shaped opening on the hemispherical body as the closing element. The V-shaped opening has a sharp cutting edge, and during the rotation of the ball, there is a wiping effect between the closing elements, which has a strong cutting force on the medium. The V-shaped opening of the ball forms a fan-shaped area with the valve seat flow channel, and during the rotation process, the cross-sectional area of the flow channel can be changed to form precise adjustment of the medium. It is an angle rotation regulating valve with the same sealing performance as ordinary ball valves, making it have both regulating and switching functions. It is matched with pneumatic or electric actuators and widely used in industrial process control systems. Manual clamp ball valve VQ77H-16P product features 1. Valve body integral structure: Both clamp type and flange type V-shaped ball valves have an integral side mounted structure with strong structural rigidity, which is not easy to cause deformation and leakage. 2. Upper and lower self-lubricating bearings: The valve body is equipped with upper and lower self-lubricating bearings, which have a large contact area with the valve stem, high load-bearing capacity, low friction coefficient, and reduce the torque of the valve. 3. The valve seat can be selected as metal hard seal or PTFE soft seal according to the needs of the medium and working conditions: the sealing surface of the metal hard seal valve seat is welded with hard alloy, and the spherical surface is hardened by hard chromium plating or spray welding, ion nitriding, etc., which enhances the service life and temperature resistance of the sealing surface; Soft sealed PTFE valve seats or reinforced PTFE valve seats have good sealing performance, corrosion resistance, and a wide range of applications. 4. Economic practicality: The valve body is lightweight, the valve stem torque is small, and the corresponding specifications for pneumatic or electric actuators are small. Compared with other types of regulating valves, it has high cost-effectiveness. 5. Wide applicability of the medium: Due to the shear force between the V-shaped opening and the valve seat, as well as the smooth and round flow channel in the valve cavity, the medium is not easily accumulated in the cavity. Therefore, in addition to liquid media, it is more suitable for system control with fiber and solid particle media. 6. Small flow precise control: By machining the special V-shaped opening of the small caliber valve core, precise control of the small Cv value can be achieved. Design standard for manual clamp ball valve VQ77H-16P: 1. Flange standards: GB/T 9113.1-2010, JB/T 79.1-1994, HG/T20592-2009 ASME B 16.5 EN1092-1:2001 2. Pressure Temperature Rating: GB/T 12224-2007 ASME 16.34-2003 IS0 7005-1 3. Structural length standard: Clamp type: Enterprise standard Flange type: ISA S75.04-1995, IEC/DIN 534-3-2 4. Suitable temperature range: -29 ℃ -150 ℃ Normal temperature type -29 ℃ -250 ℃ Medium temperature type -29 ℃ -350 ℃ High temperature type 5. Sealing and Strength Test Standard Strength and Sealing Test Standard: GB/T 4213-2007 Strength and sealing test standard: GB/T 4213-2007 Hard sealing grade: If the user has no special requirements, the standard in the table below can be followed. If the user requests, GB/T 4213-2007 can be followed? Implement the V-level standard. The strength test pressure is 1.5 times the nominal pressure, the sealing test at the packing and flange is conducted at 1.1 times the nominal pressure, and the valve seat sealing is tested at the maximum operating pressure difference. When the maximum operating pressure difference is unclear, the test is conducted at 1.0MPa (water pressure), and when the maximum pressure difference is less than 0.6MPa, the test is conducted at 0.6MPa pressure. The medium used for the test is water with corrosion and scale inhibitors