-
Free shipping
On all orders over $199
-
Special offers
Regular sales and discounts
-
Easy returns
Hassle free returns policy
-
Chat facility
Talk to a real person
Sanitary Pneumatic Welded Butterfly Valve for Easy Process Control
- 3A Pneumatic Welded Butterfly Valve
- 304, 316L Stainless Steel
- Operating Temperatures: 15°F – 200°F
- 32Ra Finish (Roughness Average)
- Field Serviceable Design
Developed for automated sanitary processes, the Eagle 3A Pneumatic Welded Butterfly Valve features a construction from 304/316L stainless steel and utilizes an efficient air actuator for effortless flow control. Because the body is welded, there are no stagnant corners at the joints, allowing for the inside of the valve to be smooth for draining, thus satisfying the hygienic specifications of the food, dairy, and pharmaceutical industry. This valve, with its standard 32Ra surface finish and capability to be serviced in the field, provides the durability necessary for everyday use which regulated processes demand.
Product Overview
Technical Specifications
- • Size Range: 1" to 4"
- • Actuator Type: Pneumatic Rack‑and‑Pinion (Double‑Acting or Spring‑Return)
- • Body & Disc Material: 304 or 316L Stainless Steel
- • Surface Finish: 32Ra (Roughness Average)
- • Operating Temperature Range: 15°F to 200°F
- • Maximum Input Pressure (Actuator): 120 PSI
- • Certification: 3A Sanitary Standard
- • Connection Type: Butt Weld
Dimensions
| Size | D1 (Tube OD, mm) | L (Face‑to‑Face, mm) | D (Body OD, mm) | H1 (Centre to Actuator, mm) | H (Overall Height, mm) |
|---|---|---|---|---|---|
| 1" | 25.4 | 50 | 85 | 72 | 172.5 |
| 1 1/2" | 38.1 | 50 | 85 | 78 | 172.5 |
| 2" | 50.8 | 52 | 85 | 101 | 172.5 |
| 2.5" | 63.5 | 56 | 85 | 115 | 172.5 |
| 3" | 76.2 | 60 | 85 | 130 | 172.5 |
| 4" | 101.6 | 64 | 85 | 162 | 172.5 |
Key Advantages of Our Pneumatic Welded Butterfly Valve
Applications & Industries
Why Choose Eagle Valves
Frequently Asked Questions
What is a pneumatic butterfly valve?
A pneumatic butterfly valve is a device that controls flow through a pipe by inserting and rotating a disc. In sanitary processes, it offers the perfect combination of automation and a valve body that can be cleaned without dismantling the system. The pneumatic action in butterfly valves permits remote operation, synchronization with other devices, or connection to an automated process.
Can you use butterfly valves on compressed air?
The pneumatic actuator used on this valve runs on compressed air, generally between 60 and 120 PSI of dry, clean air obtained from the plant. The butterfly valve is in charge of controlling the process fluid (liquid, steam, gas), whereas compressed air is the source for opening and closing the valve through the actuator.
What are the three types of butterfly valves?
Basically, there are three butterfly valve types categorized according to the type of disc and seat used. The first is zero offset (concentric), which means that both the disc and seat are located centrally in the pipe and it seals through compression of the soft liner. The second type is double offset (high performance), where the disc is offset slightly to minimize wear of the seat during opening. On the other hand, the third type is triple offset that works under high pressure and high temperature conditions or for critical isolation applications where there is metal-to-metal sealing. In a sanitary process setting, the type of valve that will be mainly used is the concentric design with a resilient EPDM, Viton, or Teflon seat because it provides a bubble-tight seal at moderate temperatures and pressures, and it can be cleaned using CIP method.
What is the working principle of pneumatic valve?
Pneumatic valves operate by employing compressed air to manoeuvre a piston within a rack-and-pinion actuator. This piston’s linear motion is transformed into rotary motion through a quarter turn of the valve stem and the connected disc. In a double-acting actuator, air pressure will be used to open the valve, while air pressure also serves to close it. In a spring-return actuator, on the other hand, air pressure is used to open the valve while a mechanical spring is responsible for its closing when the air supply runs out. This thus guarantees a safe position in case of an interruption in the supply of air.
Request Custom Quote
Contact our engineers for application‑specific recommendations, actuator sizing, and material selection
GET PERSONALIZED QUOTATIONResponse within 4 hours | Actuator torque and sizing assistance | Competitive pricing with full documentation
