วาล์วนิวเมติกส์ วาล์วระบบลม ท่อ 2นิ้ว COVNA DN50 2" 2 Way Stainless Steel Vacuum Ball Valve with Pneumatic Actuator (สินค้า Pre-Order)

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Feature

• High Tensile Epoxy Coated Spring Sets High tensile spring sets provide high performance in fail safe and emergency shut down operations.
• NAMUR Mounting Direct mounted solenoid connections according to NAMUR standards.
• ISO 5211 Bottom Mounting Connection Base drilling, for valve mounting, and centering, according to ISO 5211/DIN 3337 standards.
• High Visibility Position Indicator The indicator is to remain on the actuator for continuous indication when limit switch is not being used.

Specification

• Item: COVNA DN50 2 inch 2 Way Stainless Steel Vacuum Ball Valve with Pneumatic Actuator
• Size Range: DN50, 2 inch
• Acting Mode: Double Acting ,(Single Acting Option.)
• Operating Pressure: 1.6MPa (16 bar)
• Body Material: Stainless Steel
• Core Material: Stainless Stee
• Air Supply Pressure: 2.5 to 8 bar
• Sealing Material: PTFE
• End Connection: Flange End
• Applicable Media: Control of Water, Air, Gas, Oil, Liquid
• Temp. of Media: Range from -10 to +180°C (14 to 356°F) with PTFE Sealing
• Optional Actuation: Handlever or Electric Actuated
• Application: Food & Beverage, Water & Wastewater, Ultra Pure Water, Desalination, Chemical, Textile, Pharmaceutical, Pulp & Paper, Mining, Boiler and Power Industries

Principles of Single Acting & Double Acting Actuators Pneumatic Actuator

CCW	CW
Air to port A forces the pistons outwards, causing the springs to compress, The pinion turns counterclockwise while air is being exhausted from port B.   Loss of air pressure on port A, the stored energy in the springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A.	Air to port B forces the pistons outwards, causing the springs to compress, The pinion turns counterclockwise while air is being exhausted from port B. Loss of air pressure on port A, the stored energy in the springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A.
CCW	CW
Air to Port A forces the pistons outwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port B.   Air to Port B forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port A.	Air to Port A forces the pistons outwards, causing the pinion to turn clockwise while the air is being exhausted from Port B. Air to Port B forces the pistons inwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port A

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