Valve Body
Valve body type | Straight-through cast valve |
Nominal diameter | DN50 - 1000mm |
Nominal pressure | PN1.0, 1.6 MPa |
Flange standard | JIS B220, JB/T79, ANSI B16.5 - 1981, GB/T9113, HG20594 - 97, HG20618 - 97, etc. |
Connection type | Flange type, wafer type |
Bonnet type | One-piece |
Gland type | Pressure plate compression type |
Sealing packing | V-type PTFE packing, flexible graphite packing |
Valve Trim
Valve disc type | Butterfly type |
Flow characteristic | Linear |
Actuator
Actuator model | DZW, HQ, DSR, 381R |
Main technical parameters | Power supply voltage: 220V/50Hz, 380V/50Hz; Input signal: 4 - 20mA or 1 - 5V DC; Output signal: 4 - 20mA DC |
Protection class: equivalent to IP67; Explosion-proof mark: ExdⅡBT4; Manual operation function: Handle | |
Ambient temperature: -25 - 70℃; Ambient humidity: ≤95% |
Note: For detailed actuator parameters, please visit the electric actuator page for consultation.
Main Part Materials
Valve body, base | Ductile cast steel, cast steel, stainless steel, full PTFE lining |
Butterfly disc | Gray cast iron, ductile cast steel, cast steel, stainless steel and special materials, full PTFE lining |
Sealing ring | Various rubbers, PTFE |
Valve stem | 2Cr13, stainless steel, full PTFE lining |
Packing | V-type PTFE packing, flexible graphite packing |
Main Performance Indicators
Nominal diameter DN (mm) | 50 - 1000 |
Allowable pressure difference (MPa) | ≤ Nominal pressure |
Action range | 0 - 90° |
Leakage | Zero leakage |
Basic error | ±2.5% |
Hysteresis | ±2.5% |
Dead band | 1% (adjustable) |
Main Performance Specifications
Nominal diameter DN (mm) | 50 - 1800 | |||
Nominal pressure | PN (MPa) | 0.6 | 1.0 | 1.6 |
Test pressure | Strength test | 0.9 | 1.5 | 2.4 |
Sealing test | 0.66 | 1.1 | 1.76 | |
Low-pressure airtight test | 0.6 | 0.6 | 0.6 | |
Applicable media | Air, water, sewage, steam, gas, oil, etc. |
Main Dimensions and Connection Dimensions
Nominal diameter DN (mm) | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 |
L | 90 | 90 | 100 | 115 | 130 | 140 | 150 | 250 | 270 | 290 | 310 | 330 | 350 | 390 | 430 | 470 | 500 | 550 |
H | 63 | 70 | 83 | 105 | 115 | 137 | 164 | 206 | 230 | 248 | 289 | 320 | 343 | 413 | 478 | 525 | 585 | 640 |
n - φd | 4 - 18 | 4 - 18 | 8 - 18 | 8 - 18 | 8 - 18 | 8 - 22 | 12 - 22 | 12 - 26 | 12 - 26 | 16 - 26 | 16 - 30 | 20 - 30 | 20 - 33 | 20 - 36 | 24 - 36 | 24 - 39 | 28 - 39 | 28 - 42 |
H1 | Determined according to the equipped actuator | |||||||||||||||||
A, A1 | Determined according to the torque required by the valve. Different configured models have different external dimensions. | |||||||||||||||||
D1 | 125 | 145 | 160 | 180 | 210 | 240 | 295 | 355 | 410 | 470 | 525 | 585 | 650 | 770 | 840 | 950 | 1050 | 1170 |
(1) Before installation, check that the product model, tag number, and specifications match the requirements. Inspect the entire valve for missing or loose parts.
(2) Prior to installation, clean the pipeline. Ensure there is sufficient straight pipe section at the valve inlet and install a filter. When connecting the valve body to the pipeline flanges, ensure coaxiality.
(3) Thoroughly clean the pipeline before installing the valve.
(4) The installation site should ensure the safety of personnel and equipment, facilitating operation, disassembly, and maintenance.
(5) The valve should be installed vertically upright on horizontal pipelines. If necessary, it can be installed at an angle, but horizontal installation should be avoided. For occasions with heavy valve weight or vibration, use a support frame.
(6) The medium flow direction must align with the arrow on the valve body. The air supply should be dry and oil-free. The valve should be used in environments with temperatures ranging from -20℃ to 55℃.
(1) Cleaning the Valve: For general media, cleaning with water is sufficient. For media harmful to health, first understand their properties and then select an appropriate cleaning method.
(2) Disassembly: Remove rust from exposed rusted parts first. Before derusting, protect the machined surfaces of precision parts such as the valve seat, valve plug, valve stem, and push rod. Use special tools when disassembling the valve seat.
(3) Valve Seat: Minor rust or wear on the sealing surface can be repaired by machining. If damage is severe, replace the seat. However, both repaired and replaced hard sealing surfaces must be lapped.
(4) Valve Stem: If the surface is damaged, it must be replaced.
(5) Damage to Push Rod, Guide, and Sealing Surfaces: Reverse-acting actuators must be replaced; direct-acting actuators can be reused after proper repair.
(6) Compression Spring: If there are cracks or other defects affecting strength, replace it immediately.
(7) Wear Parts: Packing, gaskets, and O-rings must be replaced entirely during each maintenance. Check the valve plug and diaphragm for cracks, aging, or corrosion that may cause future failures. Decide whether to replace them based on inspection results, but the diaphragm service life should not exceed 2-3 years.
(8) When reassembling the valve, ensure alignment. Tighten bolts diagonally and lubricate sliding parts. After reassembly, debug the valve according to the factory test items and methods. During this period, accurately adjust the packing compression force and the valve plug closing position.
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If the model has not been selected before ordering, please provide us with the operating parameters:
(1) Nominal diameter DN (mm);
(2) Nominal pressure (MPa or bar);
(3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
(4) Pressure before and after the valve (pressure differential);
(5) Requirements for flow characteristics;
(6) Materials of valve body and valve core;
(7) Connection type;
(8) Driving method (provide air supply pressure, driving voltage);
(9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
(10) On-site working conditions. -
If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
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When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.