EF8551A421MO Explosion-proof coil ASCO Stainless steel, AISI 316L
5/2 solenoid valve
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 integraty levels: SIL 2 for HFT = 0 / SIL 3
for HFT = 1
• The 5/2 and 5/3 solenoid operated spool valves have threaded port
connections
• 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 EC Directives
GENERAL
Differential pressure
2 - 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar)
1/4 = 860 l/min (5/2) ; 760 l/min
(5/3) (ANR)
1/2 = 3000
l/min
| fluids | temperature range (TS) | seal materials |
| air, inert gas, filtered | 551 : - 40°C to + 80°C 553 : - 40°C to + 60°C | VMQ (silicone) + PUR (polyurethane |
MATERIALS IN CONTACT WITH FLUID
Ensure that the compatibility of the fluids in contact with the
materials is verified
Body
Stainless
steel, AISI 316L
End cover (spring)
Stainless steel
Spool valve internal parts
Stainless steel, POM
Pilot end-cover
Stainless steel
Core tube
Stainless steel
Core and plugnut
Stainless steel
Core spring
Stainless steel
Sealings & discs
NBR
Top disc
FPM
Disc holder
POM
Cartridge (Low power)
Welded, packless AISI 430
Seat
Stainless
steel
Seat insert
POM
Shading coil
Silver
Rider ring (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
• Do not connect the pressure supply to the exhaust port 3. The
“environmentally-protected” construction is not adapted for a
“distributing” function or use in NO function. Contact us for
functions available in specific versions
• 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)
• 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
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. |
Serves time
0:00 - 23:59
From Monday to Sunday
Our Service
One year quality guarantee Policy
We will check the goods quality before shipment. If there are some
unexpected problems
happen, we hope to solve the problems with buyer through friendly
in the following ways:
1, If it is quality problem, buyer can submit argue within 15days
after receiving the goods,
buyer must provide photos or video and other evidence to seller for
identify.
2, Man-made damaged, buyers take full responsibility.
3, Product quality processing program:
1) The buyer return the products for bad quality reasons for one
year (not included those
damages coursed by shipping or Man-made damaged ). A 15% restocking
fee is
assessed for any products returned in "used" condition. And then we
will send a new
product to buyer and pay for the resend shipping cost.
2) If the goods (total price including shipping is less than 10USD)
has quality problems, we
will resend a new product in buyer next order; if buyer don’t plan
to make a new order in
the near term, buyer can pay the resend shipping cost and ask to
resend a new product. If
there is an issue with the products, please contact us– we will
solve it as soon as we get
your email.
