Dwyer Instruments SAV-STF3-NC | Angle seat valve | 2" NPT | 3-9/16" actuator dia.
The Dwyer SAV-STF3-NC is a pneumatically actuated normally closed angle seat valve designed for dependable on/off process control. With a 2" NPT connection and 3-9/16" actuator, it provides fast, positive control for steam, water, air, and general process lines.
Its normally closed (NC) configuration keeps the valve closed under normal unpowered conditions and opens when pneumatic pressure is applied. This fail-safe shutoff behavior is suited to process points where the line should remain closed until an active pneumatic signal is provided.
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Part Number: SAV-STF3-NC
The Dwyer SAV-STF3-NC is designed for demanding industrial and process applications requiring reliable pneumatic on/off control. Its 2" NPT connection makes it suitable for compatible process piping, while the 3-9/16" pneumatic piston actuator provides positive valve operation.
The normally closed configuration means the valve remains closed when pneumatic pressure is removed and opens when air pressure is applied. This fail-safe shutoff behavior can be useful in process interlocks and other systems where flow should be stopped by default when pneumatic power is unavailable.
The angle-body design provides an efficient flow path and can help reduce flow resistance and pressure drop compared with a conventional globe valve of similar size. The piston actuator is suited to applications involving frequent cycling, including batching, washdown, and process control systems.
The valve features stainless steel wetted parts and a PTFE seat, providing broad media compatibility for suitable process applications. Its compact actuator footprint also makes it practical for integration into existing equipment, skid systems, and panel layouts.
For applications requiring the opposite operating behavior, the Dwyer range also includes the SAV-STF3-NO, a normally open version with the same 2" NPT connection and 3-9/16" actuator.
Key Benefits
- 2" NPT process connection
- 3-9/16" pneumatic actuator
- Normally closed configuration for fail-safe shutoff
- Angle-body design for efficient flow
- Stainless steel wetted parts
- PTFE seat material
- Pneumatic piston actuator for frequent cycling
- Suitable for steam, water, air, and general process applications
- Compact design for skid and panel installations
Who This Product Is Best For
The Dwyer SAV-STF3-NC is suitable for process and utility engineers, industrial automation professionals, maintenance teams, and control-system contractors who require pneumatic on/off control in 2" NPT process lines.
It is particularly suited to steam, water, air, batching, washdown, and process interlock applications where normally closed or fail-safe shutoff operation is required.
How to Use
- Install the SAV-STF3-NC in the process line using the 2" NPT connection.
- Connect the pneumatic actuator to a suitable compressed-air supply.
- Verify the normally closed operating behavior before commissioning.
- Apply pneumatic pressure to open the valve.
- Remove pneumatic pressure to verify that the valve returns to the closed position.
- Cycle the valve to confirm smooth and positive on/off operation before placing the system into service.
Frequently Asked Questions
What is the NPT size of the SAV-STF3-NC?
The SAV-STF3-NC has a 2" NPT connection.
What actuator diameter does the SAV-STF3-NC use?
It uses a 3-9/16" pneumatic actuator.
Is the SAV-STF3-NC normally open or normally closed?
The SAV-STF3-NC is normally closed (NC). It remains closed when pneumatic pressure is removed and opens when air pressure is applied.
What materials are used in the SAV-STF3-NC?
The valve has stainless steel wetted parts and a PTFE seat.
What applications suit the SAV-STF3-NC angle seat valve?
It is designed for on/off control in steam, water, air, and general process lines, including batching, washdown, and process interlock applications.
Does GeneralTech Shop deliver the SAV-STF3-NC across the UAE?
Contact GeneralTech Shop at +971 6 5436933 to confirm availability and delivery timelines for your emirate.
What is the difference between the SAV-STF3-NC and SAV-STF3-NO?
Both models have a 2" NPT connection and 3-9/16" actuator. The SAV-STF3-NC is normally closed and opens when pneumatic pressure is applied, while the SAV-STF3-NO is normally open and closes when pneumatic pressure is applied.
Request a Quote
Looking for the Dwyer SAV-STF3-NC Angle Seat Valve in the UAE? Contact Generaltechshop.ae for pricing, availability, and ordering assistance.
Call: +971 6 5436933
