Ningbo Fly Automation Co., Limited
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1. Product Name: NF551H402 551H402 ASCO 551 Series 1/4 Inch Pilot Operated Aluminium Body Solenoid Valve
2. Samples
You can send a sample to customize the products, we have many engineers can help it; If you want a product of mine, but you are not sure if it's what you want, so you can ask for a sample from me, it will be free.
3. Drawing
| prefix option | plage de puis-sance | A | B | C | D | E | weight | |
| monostable | 5/2 bistable - 5/3 | |||||||
| SC | BP | 125 | 174 | 107.7 | 22.5 | 86.5 | 0.86 | 1.37 |
4. Product show
5. FEATURES
• The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1
• The spool valves have threaded port connections and "NAMUR" style interface
• The same spool valve can be adapted for 3/2 NC or 5/2 function for controlling double-acting and single-acting actuators
• All the exhaust ports of this spool valve are connectable, providing better environmental protection, particularly recommended for sensitive areas such as clean rooms, and applications in the pharmaceutical and food processing sectors
• The valve offers environmental protection against the ingress of liquids, dusts or any other foreign matter (environmentally-protected construction)
• Can be externally piloted (external air pilot supply) to convert valve to zero minimum operation by flipping a gasket
• The solenoid valves satisfy all relevant EU Directives
6. GENERAL
Differential pressure 2 - 10,4 bar [1 bar = 100 kPa]
Flow (Qv at 6 bar) 1/4 = 700 l/min (ANR)
1/2 = 3000 l/min
fluids air, inert gas, filtered
temperature range - 25°C to + 60°C
seal materials NBR (nitrile) + PUR (polyurethane)
7. MATERIALS IN CONTACT WITH FLUID
Ensure that the compatibility of the fluids in contact with the materials is verified
Body Aluminium, black anodized
End cover (spring) Glass-filled PA
Interface plates Glass-filled PA
Spool valve internal parts Zamak, stainless steel, (POM), aluminium
Pilot internal parts Refer to specific solenoid catalogue pages
Pilot end covers Aluminium
Core tube Stainless steel
Core and plugnut Stainless steel
Core spring Stainless steel
Seals NBR
Top disc PA
Disc holder POM
Cartridge (low power) Welded, packless AISI 430
Seat Brass
Seat insert POM
Shading coil Copper
Rider rings (low power) PTFE (NF/WSNF solenoids only
1. Product Name: NF551H402 551H402 ASCO 551 Series 1/4 Inch Pilot Operated Aluminium Body Solenoid Valve
2. Samples
You can send a sample to customize the products, we have many engineers can help it; If you want a product of mine, but you are not sure if it's what you want, so you can ask for a sample from me, it will be free.
3. Drawing
| prefix option | plage de puis-sance | A | B | C | D | E | weight | |
| monostable | 5/2 bistable - 5/3 | |||||||
| SC | BP | 125 | 174 | 107.7 | 22.5 | 86.5 | 0.86 | 1.37 |
4. Product show
5. FEATURES
• The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1
• The spool valves have threaded port connections and "NAMUR" style interface
• The same spool valve can be adapted for 3/2 NC or 5/2 function for controlling double-acting and single-acting actuators
• All the exhaust ports of this spool valve are connectable, providing better environmental protection, particularly recommended for sensitive areas such as clean rooms, and applications in the pharmaceutical and food processing sectors
• The valve offers environmental protection against the ingress of liquids, dusts or any other foreign matter (environmentally-protected construction)
• Can be externally piloted (external air pilot supply) to convert valve to zero minimum operation by flipping a gasket
• The solenoid valves satisfy all relevant EU Directives
6. GENERAL
Differential pressure 2 - 10,4 bar [1 bar = 100 kPa]
Flow (Qv at 6 bar) 1/4 = 700 l/min (ANR)
1/2 = 3000 l/min
fluids air, inert gas, filtered
temperature range - 25°C to + 60°C
seal materials NBR (nitrile) + PUR (polyurethane)
7. MATERIALS IN CONTACT WITH FLUID
Ensure that the compatibility of the fluids in contact with the materials is verified
Body Aluminium, black anodized
End cover (spring) Glass-filled PA
Interface plates Glass-filled PA
Spool valve internal parts Zamak, stainless steel, (POM), aluminium
Pilot internal parts Refer to specific solenoid catalogue pages
Pilot end covers Aluminium
Core tube Stainless steel
Core and plugnut Stainless steel
Core spring Stainless steel
Seals NBR
Top disc PA
Disc holder POM
Cartridge (low power) Welded, packless AISI 430
Seat Brass
Seat insert POM
Shading coil Copper
Rider rings (low power) PTFE (NF/WSNF solenoids only
