Wafer butterfly valve with a single-acting pneumatic actuator, designed for precise flow control in industrial applications. The 316SS stainless steel disc provides excellent corrosion resistance, while the GG25 grey cast iron body with an epoxy coating ensures mechanical strength and long service life.

GG25 cast iron body

Robust construction with a long service life

SIL certification

Verified actuator safety in accordance with IEC 61508

Single-acting SR actuator

Reliable operation with spring return

Wide range of industrial applications

Suitable for water treatment plants, food processing, pharmaceuticals and more

Pneumatic shut-off butterfly valves are widely used across various industries where reliability and long service life are essential. They are used primarily in water and wastewater treatment plants, where they provide precise control of liquid flow. They also play an important role in the food and beverage industry, where strict hygiene standards must be met. In the pharmaceutical industry, they contribute to safe handling of chemicals and sterile media, while in the chemical industry they withstand aggressive substances. Another key area of application is the oil and gas sector, where high resistance to extreme conditions is required.

The main advantage of these valves is their corrosion resistance, ensured by a 316SS stainless steel disc. The GG25 cast iron body with an epoxy coating provides excellent mechanical strength and long service life. The valves are available with various types of pneumatic actuators, tailored to specific applications. Another benefit is their easy installation and maintenance, which reduces operating costs and ensures trouble-free system operation.

Single-acting SR pneumatic actuator

The valve is fitted with a TORK SR single-acting pneumatic actuator, which provides:

• Reliability with spring return in the event of air supply failure.
• Optimised performance with low air consumption.
• Compact design for easy integration into the system.

Single-acting pneumatic actuators use compressed air to drive the valve in only one direction (opening or closing). A spring is used to return it to its default position. When air is supplied to the actuator, the valve, for example, opens; when the air is disconnected, the spring force automatically returns it to its original (closed) position. This type of actuator is ideal for applications where, for safety reasons, an automatic valve response is required in the event of power loss. They are widely used across many industries thanks to their reliability and simplicity.

SIL certification

The International Electrotechnical Commission (IEC) issued the IEC 61108 standard, which defines safety requirements.

For equipment to obtain SIL certification, it must meet all defined requirement categories; for example, SIL 3 allows the possibility of a dangerous product failure only once every 1,140 years, reflecting a very high level of reliability.

Actuator options

On request, valves can be supplied fitted with pneumatic actuators:

• With ATEX certification
• With PTFE coating
• Arctic version down to -60°C
• 3-point control