SMDF-DNB Rotating Disc Valve , Dual Plate Swing Check Valve 1.0 MPa Pressure
Production information
. Rotating disc valve employs ceramic or hard metal friction pair structure , which makes it more abrasive and better tightness . It just needs a small starting load because the unique structure . Besides , ashes hardly accumulate in the valve body due to the same reason . All these features make the rotating disc valve durable .
Operating Principle
. The actuator moves the stem and lever arm a quarter turn which drives the disc . The entire sealing surface of the disc is constantly in contact with the seat or pad through force exerted by coiled springs . These springs allow the disc to move vertically . This compensates for thermal expansion and contraction of the valves components also overcoming the effect of any back pressure for which it was designed and between the sealing surfaces . Differences in tangential disc to seat friction forces cause the disc to rotate on its seat as the valve cycles , thereby shearing and wiping away any process material that may accumulate . All these features make the rotating disc valve durable . It will provide reliable support for your system .
Applications
. The rotating disc valve can be used in ash conveying system in thermal power plants. It also can be applied in mine , cement plant , lime work , metallurgic plant , chemical factory and other fields that need to convey caustic or abrasive ash .
Technical Parameters
. Maximum operating pressure: 1.0 MPA
. Maximum test pressure: 1.5 MPA
. Operating temperature: ≤ 200℃
. Leakage test pressure: 1.1 MPA
Installation
1. Prior to installation , please read this manual carefully , and check the pneumatic actuator’s condition .
2. Ensure the flange’s dimension , maximum operating pressure and inside nominal diameter meet the requirements .
3. Do not adjust the bolts and nuts . And make sure the center of two pipelines and valve center are coaxial . Flange surface should be smooth and keep horizontal without relatively large slope , for make sure the valve can fasten and work well . Besides , the bolts should be symmetrically fastened .
4. After installation , pump air into the two air intakes of the pneumatic actuator , and make sure the valve plate work properly .
5. If the control switch is installed , ensure its parameters can meet the external power source and it can work properly in fully open or fully close .
Troubleshooting Method
| Troubles |
Cause |
Troubleshooting Method |
| Leakage |
Foreign body |
Remove foreign body |
| Seal washer is invalid |
Replace seal washer |
| Valve core abrasion |
Replace valve core |
| Valve cannot open or close |
Rotatable parts become flexible or invalid |
Adjust or replace the relative parts |
| Insufficient pressure or leakage |
Check and repair supply air line |
| Pneumatic components become ageing or invalid |
Replace the relative pneumatic components |
Installation dimension and outline
| DN |
H |
D |
K |
d |
n-C |
| 150*150 |
310 |
285 |
240 |
210 |
8-Φ22 |
| 200*200 |
310 |
340 |
295 |
265 |
8-Φ22 |
| 225*225 |
310 |
370 |
325 |
295 |
8-Φ22 |
| 250*250 |
330 |
395 |
350 |
320 |
12-Φ22 |
| 300*300 |
330 |
445 |
400 |
368 |
12-Φ22 |
| 200*350 |
310 |
520 |
470 |
265 |
8-Φ22 |
Main Components and materials
| NO. |
Item |
Material |
NO. |
Item |
Material |
| 1 |
Upper valve body |
Ductile cast iron |
5 |
Under valve body |
Ductile cast iron |
| 2 |
Seal ring |
Ceramic or alloy |
6 |
Rotating shaft |
45# Steel |
| 3 |
Valve plate |
Ceramic or alloy |
7 |
Rotary arm |
Ductile cast iron |
| 4 |
Swing arm |
Ductile cast iron |
8 |
Pneumatic actuator |
Aluminum |
Q: Could you offer the free samples ?
A: Yeah, but it depends products, Pls contact us ina@pneuhydr.com or whatsapp 0086 15168536055
Q: What ' s your business scope ?
A: Our business scope is service of exporter automation parts with full container, and sell air cylinder , air source treatment , solenoid valve , air valve, motorize valve , Brass valve, hydraulic valve, hydraulic cylinder, air and oil fitting, pressure gauge etc .
Q: What types of products you can make ?
A: We can make many kinds of stainless steel, brass ,aluminum materials processing .like high pressure Valve / solenoid valve / electric valve / water valve/pneumatic valve/air cylinder/hydraulic valve/hydraulic accumulator products and so on .
Q: Can the product be made with our logo and brand ?
A: Yes , of course , we can make . we are OEM supplier for years and professional to make . But you need give us the authorization if it is possible .
Q:Can you provide original famous pneumatic and hydraulic,instruments brand goods ?
A: Yes,We can supply like Festo,Smc,Ckd,Burket,Hydac,Rexroth,Siemens,Rosemount,Marsh ,Endress+Hauser etc.
Q: Is there a warranty available?
A: Yes, normally products is one year quality guarantee.
Q: Is the connector in British or Metric system? What is the difference between PT, NPT, and G threads?
A: The G thread is cylindrical and does not seal itself, requiring additional gaskets to prevent leakage. PT and NPT are conical, and the internal and external threads become tighter and tighter when tightened. Sealing is achieved through the deformation of the threads, and sealant or tape is usually used in conjunction to enhance the sealing effect
G-thread is a cylindrical straight pipe used for non sealed connections; PT thread is a conical tube that relies on the deformation and sealing of the thread itself; NPT is also a conical tube with a tooth profile angle of 60 degrees, mainly used in North America
Q: How to convert pressure units: MPa, bar, psi, kg/cm ²?
A: 1MPa=10bar≈145psi≈10kg
Q:What usually causes the burnout of solenoid valve coils?
A:Incorrect voltage and hz, frequent switching, pilot head entering liquid,valve core and spring problem,environment hot,heavy vibration etc.
Q: What should be noted for pneumatic components in high temperature or extremely cold environments?
| Focus Point |
High Temperature Environment Countermeasures |
Extreme Cold Environment Countermeasures |
| Seals |
Fluororubber, PTFE |
Low-temperature nitrile, silicone rubber, polyurethane |
| Lubrication |
High-temperature synthetic grease (low volatility) |
Low-temperature grease (low pour point, low viscosity) |
| Air Supply Treatment |
Strengthen cooling, efficient water removal |
Ultra-low dew point drying (refrigeration + adsorption type), heat tracing |
| Metal Components |
Reserve expansion clearance |
Select materials with low-temperature toughness, prevent leakage due to cold shrinkage |
| Control Components |
High heat-resistant grade coils, heat dissipation, low power consumption |
Install insulation boxes, local heating, prevent cold condensation |
| Installation |
Keep away from heat sources, add heat insulation plates |
Avoid exposure to wind and snow, wrap with thermal insulation materials |
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