Active Member
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[China]
Address: ZHONGXING EAST ROAD 208, XIKOU TOWN315502, FENGHUA CITY, ZHEJIANG PROVINCE, CHINA
Contact name:Ricky
Ningbo Nijia Electronics Technology Co.,Ltd |
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NF8551B401MO NF8551B402MO Flameproof coil with aluminum alloy shell G1/4" 3/2~5/2 way ASCO Solenoid valve
monostable/bistable
FEATURES
• The monostable spool valves in conformity with IEC 61508 Standard
(2010 route 2 H 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 solenoid operated spool valves have threaded port connections
and "NAMUR" interface
• The same spool valve can be adapted for 3/2 NC or 5/2 functions
for controlling double-acting and single-acting actuators
• All the exhaust ports of the 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 valves offer environmental protection against the ingress of
liquids, dusts or 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
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 | temperature range (TS) | seal materials |
| air, inert gas, filtered | - 25°C to + 60°C | NBR (nitrile) + PUR (polyurethane) |
MATERIALS IN CONTACT WITH FLUID
Ensure that the compatibility of the fluids in contact with the
materials is verified
Body, end cover
Aluminium, black anodized
End cover (spring return)
Glass fibre filled PA
Interface plates
Glass fibre 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, stainless steel or
aluminium
Seat
Brass
Seat insert
POM
Shading coil
Copper
Rider rings (low power)
PTFE (NF/WSNF solenoids only)
INSTALLATION
• Multi language installation/maintenance instructions are included
with each valve
• The solenoid valves can be mounted in any position without
affecting operation
• 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
• 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
• Dowel pin (if necessary), bolts and gaskets are standard supplied
• IEC 61508 Functional Safety (suffix SL). Check temperature range
of valve body and solenoid for suitability. For probability of
failure, contact us
• 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.)
• Threaded pipe connection identifier is 8 = NPT (ANSI 1.20.3); G =
G (ISO 228/1)
• Ex db Prefix "NF/WSNF" enclosure is provided with a 1/2" NPT
threaded entry hole, M20 x 1,5 (prefix "ET") is optional. These are
supplied without cable gland
• To comply with IEC 61508 (SIL) the valves must be provided with a
specific exhaust protector (see following pages)
Competitive Advantage
| Our product features | Our Services Guarantee: |
| 1) Competitive price | 1) Prompt respond (Reply with 24 hours) |
| 2) Good quality | 2) Free Samples (Customer pay for the delivery cost) |
| 3) Professional Packaging | 3) Registration support. |
| 4) Produce according to Customers’ instruction | 4) Photos/videos are available during production. |
| 5) None delay shipment | 5) Loading inspection, and send loading photos before shipment. |
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.
Serves time
0:00 - 23:59
From Monday to Sunday
