Bring high quality, safety and reliability to systems and operations
Meisonilan specializes in providing solutions for process control valves and shut-off valves to industries such as energy, chemical engineering, electric power, life sciences, and environmental protection. For many years, our automation technologies have been driving operational optimization. Leveraging our field-proven expertise, we provide support for your low-emission strategies.
Technical Parameter

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
Valve Installation & Maintenance
Valve Installation:
(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℃.

Valve Maintenance:
(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.
Ordering Instructions
When placing an order, please fill in the Specification Sheet or specify the following information:
  1. 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.
  2. 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;
  3. 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.
Upload order instructions Submit Now
Request Quote
Get your exclusive quotation
  • Your phone number
  • Your email
  • Your name
  • Your company
  • Selected product
  • Request details

National Unified Service Hotline
(086 )0512-68126111
Email: sales@meisonilan.com
Address: No. 2588, Tian'e Dang Road, Hengjing, Wuzhong District, Suzhou City
【Scan WeChat】
Copyright © 2021 Meisonilan Valves (Suzhou) Co., Ltd. All Rights Reserved.
Privacy Policy