CEM ATEX electric BLC-ex Centrifugal blowers are widely used on board for extraction and ventilation of air in closed environments where there are explosive vapours such as garages and engine rooms
The centrifugal fan was invented in 1832 by military engineer Lieutenant General Alexander Sablukov of the Russian Empire’s Imperial Russian Army
Often called “blowers”, centrifugal fans vary differently from axial fans
The pressure of an incoming airstream is increased by a fan wheel, a series of blades mounted on a circular hub
Centrifugal fans move air radially — the direction of the outward flowing air is changed, usually by 90°, from the direction of the incoming air
CEM pumps and blowers ATEX BLC centrifugal blower
The airflow created by centrifugal fans is directed through a system of ducts or tubes.
This helps create a higher pressure airflow than axial fans. Despite a lower flow rate, centrifugal fans create a steadier flow of air than axial fans.
Centrifugal fans also require a higher power input
Many modern yacht owners and guests like to take advantage of toys such as jet-ski’s, many of these fun things require fuelling in small spaces such as garages
Ventilation of these spaces create unique problems for the boat owners, operators and insurers to extract potentially dangerous vapours and make these spaces safe for the entire vessel
A standard engine room fan may be a small source of ignition when starting, running and turning off, not normally a problem in an engine room, however this could be the difference between life and death in a petroleum vapour rich environment
This is where the CEM ATEX BLC-ex Centrifugal fan could be the solution you have been looking for
ATEX MOTOR DETAIL:
Jetski fuelling in superyacht garage requiring ATEX Fans
Alternating current:
Induction electric motor (ATEX)
110V single-phase (MS) – 60Hz (available on request)
230V single-phase (M) – 50Hz (60hz available on request)
230~400VAC Three-phase – 50Hz (60hz available on request)
Protection IP54÷55
Insulation Class Ex
Continuous Duty (S1)
Centrifugal fan action on the medium
Fan blades: steel forward blade, dynamically and statically balanced (Non-sparking design)
Centrifugal fans are constant-displacement or constant-volume devices, meaning that, at a constant fan speed, a centrifugal fan moves a relatively constant volume of air rather than a constant mass.
This means that the air velocity in a system is fixed even though the mass flow rate through the fan is not
Offshore Oil and gas – A place where the ATEX certification is critical for safety
ORIENTATION
Please note: the orientation of the blower must be stated when ordering OPTIONS: RD: right direction LD: left direction
CONSTRUCTION FEATURES
Motor: ATEX Spiral casing: made of AISI 316 stainless steel Fan: steel forward blade, dynamically and statically balanced Note: our BLC blowers are supplied with flanged fittings on the inlet and outlet side and a safety grid on the inlet side
The centrifugal fan uses the centrifugal power supplied from the rotation of impellers to increase the kinetic energy of air/gases. When the impellers rotate, the gas particles near the impellers are thrown off from the impellers, then move into the fan casing.
As a result, the kinetic energy of gas is measured as pressure because of the system resistance offered by the casing and duct.
The gas is then guided to the exit via outlet ducts. After the gas is thrown-off, the gas pressure in the middle region of the impellers decreases. The gas from the impeller eye rushes in to normalize this. This cycle repeats and therefore the gas can be continuously transferred
Image of Logo for the ATEX certificationCEM Pumps logo Square
About CEM Pumps and Blowers
Established in 1970 C.E.M. elettromeccanica S.r.l. has been a leading manufacturer of electric pumps and DC motors primarily focussed for use in the maritime sector
In the 48 years, we have been making motors and our constant expansion in the national and the international markets have resulted in the broadening of our extensive product range
…highest quality materials…design…innovative production processes…remarkable lifespan…
This makes us the ideal partner for large and medium-sized boat builders of pleasure, fishing and military vessels.
CEM Pumps and blowers factory
Our extensive range now includes:
DC and AC electric pumps
Belt driven pumps, with manual or electromagnetic clutch
hydraulically driven pumps
water pressure systems
centrifugal and axial blowers
diesel driven pumps
manual pumps
DC motors
Our commitment to using the highest quality materials used, the special care invested in the design and in the innovative production processes we adopt, we are able to offer excellent performances and a remarkable lifespan of our products exactly what you need when our product can offer extra hours of safety when in difficulty
The CEM factory is based in Nonantola close to Modena in Italy, and is a family-owned business with generations of experience in the manufacture of pumps, blowers and electric motors
