The HT-S-EX Rotary valves have inherited all the positive features of the HT-EX rotary valve, but they are also suitable for harsh operating environments due to their more robust construction.
In terms of overall dimensions and flange type, HT-(S)-EX is compatible with the HT, HT-EX and HT-S series.
These HT-(S)-EX rotary valves are used in dust collection, and at the same time function as 'air lock' under dust filters and cyclones, like all HT series, but with the difference that they are suitable for higher pressure differences, in situations where there is need for an “explosionbarrier” according to ATEX directives. This type of rotary valve is equipped with PU rotorblades (4mm) or a steel or stainless steel fixed rotor and is explosionproof and flame transition resistant up to 2.5 bar (depending on version).
Also the processing of abrasive materials, may be a reason to choose the HT-S-EX series. These rotary valves are also used as metering devices under silos and bunkers, and in most of the mentioned situations, act as an “airlock” in the conveying system in order to maintain a certain pressuredifferential.
The HT-S-EX series have a maximum capacity of 25 m3/h at a maximum pressure differential of 40.000 Pa (0,4 bar). They are especially suited for use in waste incineration plants, construction materials industry, grain processing, paper- and woodprocessing industries and plastics-recycling.
SPECIFICATIONS FOR ROTARY VALVES TYPE HT-EX
CONNECTION FLANGES | DN 250 - DN 350 |
ROTOR VOLUME | 6.5 to 20 LITERS |
BODY AND COVERS | Cast iron, optional with hard chrome or nickel plating |
ROTOR CONSTRUCTION | Steel or stainless steel with 8 chambers and fixed or Vulkollan (PU) rotor blades |
BEARINGS | External bronze plain bearings or ball bearings |
ATEX | Pressure-shock-resistance and flame proof up to 0.5 bar (vulkollan rotor blades) |
MARK | CE 0588 ATEX II ID/* c T4 EX D (Safety Device) FSA 12 ATEX 1620 X |