Valves and Valve Equipment

Actuator Mountable Ball Valve: 3-Piece Threaded Stainless Steel Model

Learn about 3-piece threaded stainless steel actuator mountable ball valves with ISO 5211 mounting pads: key features, testing, specifications and applications.

ORFA Technical TeamUpdated: Oct 30, 20263 min read

Actuator mountable 3-piece threaded stainless steel ball valve

As industrial automation has spread, valves operated by commands from control systems rather than by hand have become standard. An actuator mountable ball valve is a quarter-turn valve designed so that a pneumatic or electric actuator can be fitted to it. The 3-piece threaded stainless steel models supplied by ORFA offer reliable sealing under demanding conditions and easy integration into automation.

This article covers the features, advantages, materials, specifications and applications of actuator mountable ball valves.

What Is an Actuator Mountable Ball Valve?

A ball valve is a quarter-turn valve that switches quickly between fully open and fully closed by rotating a bored ball through 90°. Actuator mountable models have a standard mounting pad on top of the valve, allowing it to be opened and closed remotely and automatically by an actuator instead of by hand. The three-piece body also provides easy access to the internal parts for maintenance.

Advantages

ISO 5211 mounting pad: The standard mounting pad makes it easy to pair the valve with pneumatic or electric actuators of different makes and types.
Low pressure drop: Very little resistance to flow in the fully open position, which helps save pumping energy.
Easy operation: Light and compact, the valve is also easy to operate manually before an actuator is fitted.
Reliable sealing: Ball seats and stem seals are designed to minimise leakage both in the line and at the stem.
Tested performance: According to manufacturer data, every valve undergoes an underwater air leak test at 10 bar.
Easy maintenance: The three-piece body makes it easy to replace seals and seats.

Materials and Specifications

Feature	Value
Body and ball material	AISI 316 / AISI 304 stainless steel
Connection	Threaded
Nominal size	DN15 (1/2″) – DN100 (4″)
Maximum operating pressure	PN40–PN63 depending on model (e.g. max. 40 bar for Ayvaz V-3TP per the manufacturer datasheet); allowable pressure falls as temperature rises, check the pressure-temperature chart
Operating temperature	Typically -25 °C to 180 °C (depends on seat material)
Actuator mounting	ISO 5211 mounting pad

Tip: On threaded three-piece valves, the centre body can be swung out of the line by removing the body bolts, allowing maintenance without disturbing the pipe connections. Remember to use a thread sealant suitable for the medium during installation.

Applications

Heating and cooling lines
Food and chemical plants
Shipbuilding
Paper mills
Hot and cold water lines

Frequently Asked Questions

What does an ISO 5211 mounting pad do?

ISO 5211 standardises the mounting interface between quarter-turn valves and actuators, so actuators with a matching flange and drive size can be mounted directly or with a simple bracket and coupling.

Can this valve be used without an actuator?

Yes. The valve can be operated manually with a lever and automated later by fitting an actuator when required.

How do I choose between threaded and flanged actuated ball valves?

Threaded models are generally a practical and economical choice for small and medium pipe sizes, while flanged models are preferred for larger sizes or flanged installations.

Conclusion

Actuator mountable 3-piece stainless steel ball valves provide reliable, precise and efficient flow control in industrial automation. Their durable construction, standard actuator interface and easy maintenance contribute to plant performance. For other models, explore our ball valves product group.

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