5308 5309 Series Ball Valve

5308 5309 Series Ball ValveConcept

Ball valves are ideal for applications requiring a full flow body design to minimize line turbulence and pressure drop. An encapsulated seat option is available for critical process applications requiring maximum reduction of potential for product entrapment.

Standard Design

The Ball valve consists of a stainless steel body that houses a rotating ball. The rotating ball is sealed in the body with a PTFE seat that either partially or fully encapsulates the ball. The valve is activated by a stainless steel handle that opens and closes the valve through a quarter turn. The valve can also be operated by an optional ¼ turn pneumatic or electric actuator. External thrust springs maintain constant pressure on the stem packing. The stem and packing design eliminate the possibility of the stem becoming dislodged or blown out.


How it works


The Alfa Laval 5308/5309 Series Ball Valve consists of a valve body, two flanges, PTFE valve seats, ball, stem unit and a handle for manual operation. For quick and easy inspection and maintenance, the valve easily assembles and disassembles with welded-end flange screws.

Operating principle

A precision-made ball with a bore, or opening, is positioned inside the valve body between two flanges and two PTFE valve seats.


• Quarter-turn handle for manual operation
• Fittings in accordance with required standard (ISO or DIN)
• PTFE encapsulated valve seats

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