Fisher A31A High-Performance Butterfly Valve

Fisher A31A High-Performance Butterfly Valve, a metal-seated butterfly valve designed for on/off isolation and shutoff control in industrial pipeline systems.

 

1. Tight Shutoff Sealing

Pressure-assisted seal, NPS 3-24 bi-directional bubble-tight, Phoenix Ⅲ fire-tested seal.

 

2. Proven Structural Design

Keyed shaft connection ensures stable torque transmission. The anti-blowout shaft design prevents axial shaft ejection.,

 

3. Low Emission Control

4. Easy Installation

 

The Fisher A31A offers a broad range of nominal pipe sizes, with design optimization based on size segments:

• NPS 3–12 (available in cryogenic / low-temperature versions)

Suitable for small- to medium-diameter high-precision or high-pressure applications

Compact design compatible with smaller actuators

• NPS 14–24

Ideal for large-diameter, high-flow applications

Reinforced body structure to handle higher torque requirements

This segmented design ensures consistent control performance and mechanical strength across all sizes.

 

Oil & Gas

Chemical & Petrochemical

Power & Energy

Water Treatment & Utilities

Food, Pharmaceutical, and General Process Industries

 

The A31A can be operated using:

Handlever

Handwheel

Pneumatic piston or diaphragm actuators

For automated control and high-precision positioning, it can be equipped with the Fisher DVC6200 Digital Valve Positioner (including stainless steel version), providing real-time feedback, status diagnostics, and precise control.

 

 

Item	Specification
Valve Body	Single-flange (Lug) or wafer-style, one-piece body, two-piece seal/backup O-ring, keyed drive shaft
Size Range	NPS 3–24 (Cryogenic / low-temperature: 3–24; Standard: 14–24)
Flange Connection	Compliant with ASME B16.5 CL150 or CL300
Pressure/Temperature Rating	ASME B16.34 CL150 / CL300
Disc Coating	Hard coating
Shaft Extension	0–304.8 mm (0–12 in.) depending on temperature
Shutoff Class	- Standard Soft Seal: Bi-directional bubble-tight - NOVEX Seal: Uni-directional - Phoenix III Seal: Bi-directional bubble-tight, fire-tested
Actuators	Handlever, handwheel, pneumatic piston
Disc Rotation	Clockwise to close
Standards	MSS SP68, API 609, ANSI/FCI 70-2, IEC 60534, API 607

Note: Structural features, pressure rating, seal type, and recommended actuators may vary by size range and version. Please refer to the technical datasheet or contact an engineer for guidance.

1.Global Supply Experience

Years of experience supplying industrial valves for domestic and international projects.

 

2.Fast Delivery

Multiple shipping options including air, sea, and express delivery to meet different project timelines.

 

3.Engineering Support

Technical assistance for valve model confirmation, configuration checks, and installation guidance.

 

4.Technical Documentation

Supply of product datasheets, drawings, and related documents required for project approval or installation.

 

5.18-Month Warranty

All supplied valves include 18-month warranty coverage.

 

FAQ

 

Q1: What body types are available for the Fisher A31A butterfly valve?
The Fisher A31A butterfly valve is available in wafer and single-flange body designs, depending on pipeline connection requirements.

 

Q2: What pressure standards does the valve comply with?
The valve shutoff performance meets ASME B16.34 requirements, suitable for industrial process control applications.

 

Q3: What information should be provided when requesting a quotation?
Usually valve size, pressure rating, body type, seat material, and actuator requirements are needed to confirm the correct model.

 

Hot Tags: fisher a31a high-performance butterfly valve, China fisher a31a high-performance butterfly valve manufacturers, suppliers, factory