HT-EX rotary valve - Safevent
ROTARY VALVE: TYPE HT-EX
DESCRIPTION
SPECIFICATIONS

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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