Corrosive Fume Extraction Fans
DESCRIPTION
Fan Casings
The Pifan Series II centrifugal fume extraction fans are manufactured expressly for the purpose of corrosive fume extraction. As the case is moulded in one piece, from GRP, the absence of joints and seams makes them leakproof. The cases are suitable for a wide temperature range. Stainless steel bolts and nuts are used throughout. The case is either directly coupled to the motor or to a fan base on indirect driven fans.
Impellers
The standard range has forward curved multi-vane type impellers, which have been specially designed for static pressures of up to 1370 pascals. For larger performances, the impellers used are backward curved. Each impeller is carefully checked for true running and dynamically balanced to ensure vibration free operation.
Motors
The motors are totally enclosed, fan cooled and wound for either single or three phase supply. They are normally weather-proofed. Flame-proof motors are also available.
Bases
The Series II direct coupled fans and motors are resiliently mounted on a moulded fan stool, flanged at the foot to take fixing screws or bolts. Bases are completely weather-proof and will not corrode in any weather conditions. Indirect driven units are supplied complete with moulded bearing cover, belt cover and fan stool.
Colour coding
The standard case colour is grey, however fan cases can be supplied in a range of colours. This is of particular advantage for large fume extraction installations, where colour coding of the fan can give immediate identification of the service involved, e.g. radioactive, inflammable or poisonous exhausts, or simply No.1, No.2 or No.3 duct systems, etc.
Please specify on the order if particular colours are required.
PERFORMANCE
Pifan glass reinforced plastic centrifugal fans have been developed for use primarily in extraction systems for laboratory fume cupboards, hoods, acid tanks and industrial plants where corrosive and hazardous fumes are handled. The capacity of the fans range between 100 to 3700 I/s (200 to 8000 cfm).
ADVANTAGES
The comprehensive range of standard fans are economically priced and are of a high standard of workmanship. They are simple to install and are quiet when operating. All Pifan fans have high pressure characteristics, are entirely free from corrosion and are supplied in one piece moulded cases. Colour coding is available if needed.
As manufacturers of the fans, we can offer site adjustment of discharge and excellent after sales service. We hold large stocks of components and provide rapid delivery of orders.
MODELS
Series II Fans
Designed principally to handle extraction of chemical fumes from fume cupboards, fume hoods, atomic absorption units and tanks. They are a direct drive type fan, available with motor speeds of 950, 1440 and 2850 rpm.
Capability: Volume 100 - 1200 I/s (212 - 2750 cfm); Pressure 50 - 1370 pascals (0.2 5.5 WG).
Series III Fans
These fans are designed as per Series II Fans, but are indirectly driven via shaft, belts, pulleys, bearings, etc. for special applications.
Capability: As Series II Fans.
Series IV Fans
Large indirectly driven fans developed to perform against higher pressure requirements in installations employing large fume scrubbers and plating plant extraction.
Capability: Volume 1400-3700 l/s (3000-8000 cfm); Pressure 249 - 2000 pascals (1" - 8" WG).
Specific performance and detailed dimensional data for all models is available on request. Our experts will be happy to provide advice on the best fan to suit your own particular needs.