Pneumatic Solenoid Valve NF8551B401MO WSNF8551B401MO Epoxy Coated NPT Anti

Product Specification

pneumatic NF8551B401MO WSNF8551B401MO epoxy coated NPT anti-explosion Solenoid valve

FEATURES
1. 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
2. The spool valves have threaded port connections and "NAMUR" style interface
3. The same spool valve can be adapted for 3/2 NC or 5/2 function for controlling double-acting and single-acting actuators
4. 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
5. The valve offers environmental protection against the ingress of liquids, dusts or any other foreign matter (environmentally-protected construction)
6. Can be externally piloted (external air pilot supply) to convert valve to zero minimum operation by flipping a gasket
7. The solenoid valves satisfy all relevant EU Directives

Electrical characteristics

Pictures and details

MATERIALS IN CONTACT WITH FLUID
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)

ADDITIONAL OPTIONS
1. Valves configured for external pilot air supply, TPL 20547
2. Other pipe threads are available on request
3. Ex mb (prefix "PV") solenoid can be supplied with various cable lengths
4. Compliance with "UL", "CSA" and other local approvals available on request
5. 1/2" NPT (prefix "T") and M20 x 1.5 (prefix "ET") conduits (aluminium or 316 SS) available for steel solenoid housing
6. Set of stainless steel mounting screws, catalogue number: 97802212 (series 551)
7. Set of two exhaust reducers, G1/8, catalogue number: 88100344 (series 551)

INSTALLATION
1. Multi language installation/maintenance instructions are included with each valve
2. The solenoid valves can be mounted in any position without affecting operation
3. 3/2 NC-5/2 spool valve supplied with one or two interface plates with NAMUR mating surfaces. Depending on function (3/2 NC or 5/2), position the plate (series 551) or one of the

two plates (series 553) on the spool valve body before installing on actuator
4. Do not connect the pressure supply to the exhaust port 3. The “environmentally-protected” construction is not adapted for NO function. Contact us for function available in specific

version
5. Dowel pin (if necessary), bolts and gaskets are standard supplied
6. IEC 61508 Functional Safety (suffix SL). Check temperature range of valve body and solenoid for suitability. For probability of failure, contact us
7. It is necessary to connect pipes or fittings to the exhaust ports to protect the internal parts of the spool valve and its pneumatic operator if used outside or in harsh environments

(dusts, liquids etc.)
8. Threaded pipe connection identifier is: 8 = NPT (ANSI 1.20.3); G = G (ISO 228/1)
9. Prefix "NF/WSNF" enclosure is provided with a 1/2" NPT threaded entry hole, M20 x 1,5 (prefix "ET") is optional. Both are supplied without cable gland
10. To comply with IEC 61508 (SIL) the valves must be provided with a specific exhaust protector (see following pages)

Delivery
1. If the products we have in store, we will send it out ASAP after payment.
2. If the products which were customized, we will complete the production within a specified period of time, and send it out the first time, we can promise it.
3. Also we can send by your delivery acount if you want.
4. We have a variety of ways to send goods, usually DHL, Fedex, TNL will be normal ways. If you require use of a courier, we can do it.

Competitive Advantage

After-sale Service
We can provide a series of after-sale service, such as product introduction, mounting, debugging, technical support and so on.

Warranty
All item Comes with Basic 3 Month Sellers Warranty, if item defective in 3 Month, We will offer replacement without extra Charger(including shipping fee)After we Receive the Defective item.
If item Defective after 3 Month, Buyers can still send it back, We will contact suppliers or Manufactory for Warranty. Buyers Might Need to pay the Shipping fee For resend the replaced item.