The HT-EX Rotary valves are used for transferring dry powders and granulates out of filter housings, cyclones, silos and hoppers, in situations where there is need for an “explosionbarrier” according to ATEX directives. This type of rotary valve is equipped with Pu rotorblades (4mm) and is explosionproof and flame transition resistant up to 1.7 bar.
The rotary valves can also be used for metering dry, powdered or granulated products from a storage hopper or silo into a mixer, grinding mill, conveyor screw, dryer or cooler. Apart from functioning as a metering device, these rotary valves, in most of the mentioned situations, act as an “airlock” in the conveying system in order to maintain a certain pressure differential.
The HT-EX are ATEX certified : CE 0588 EX II I D/* c T4 EX D (explosion isolation) FSA 15 ATEX 1662 X
SPECIFICATIONS FOR ROTARY VALVES TYPE HT-EX
| CONNECTION FLANGES | DN 250 - DN 350 |
| ROTOR VOLUME | 7 to 20 LITERS |
| BODY AND COVERS | Cast iron GG25 |
| ROTOR CONSTRUCTION | Open, with 8 champers |
| BEARINGS | Slide bearing |
| SHAFT SEAL | Bronze bush and oil sealing |
| MAXIMUM PRESSURE DIFFERENCE / MAX. OPERATING PRESSURE | 10.000 Pa (0,1 bar) |
| TEMPERATURE | -15°C up to 60°C |
| CAPACITY | HT-EX-250 ca. 7 liter / rev with 100% filling HT-EX-350 ca. 20 liter / rev with 100 % filling |
| IN- AND OUTLET | HT-EX-250 Ø = 250 mm (HT-EX-250) HT-EX-350 Ø = 340 mm (HT-EX-350) |
| DRIVE UNIT | HT-EX-250 Direct, with flexible coupling and gearmotor. Gearmotor: SEW 0,37 kW, 230/400V, 50Hz (in case of non-zone executions) NORD 0,37 kW, 230/400V, 50 Hz II 2D (in versions for use in zone and 22) HT-EX-350 Direct, with flexible coupling and gearmotor. Gearmotor: NORD 0,55 kW 230/400V, 50 Hz (in case of non-zone executions) NORD 0,55 kW 230/400V, 50 Hz II 2D (in versions for use in zone 21 and 22) |
| ROTATION SPEED | HT-EX 250 32 rpm HT-EX-350 33 rpm |
| FINISHING | - In- and outlet painted in color RAL 3020 (red). - Body, cover and motorconsole painted in color RAL 3020 (red). |
| ATEX CERTIFICATION | CE 0588 EX II I D/* c T4 EX D (explosion isolation) FSA 15 ATEX 1662 X |
DIMENSIONS FOR TYPE HT-250-EX ROTARY VALVE
DIMENSIONS FOR TYPE HT-350-EX ROTARY VALVE
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