Fisher 1051 Pneumatic Rotary Actuator
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Fisher 1051 Pneumatic Rotary Actuator

Stable, reliable pneumatic actuation for precise valve control. Fisher 1051 is a single-acting spring-return pneumatic rotary actuator for ball and butterfly valves, offering reliable on/off or throttling control, high precision with a positioner, 90° rotation, and durable, long-lasting performance for industrial processes.
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Product Introduction

Introduction

 

The Fisher 1051 is a single-acting, spring-return pneumatic rotary actuator for operating ball and butterfly valves.
product-1266-388

 

 

Key Advantages

 

1.Precise Reset

Single-acting spring return, 90° fixed rotation, repeat torque 25–150 in-lb, torque repeatability ≤1%.

2.High Control Accuracy

Works with Fisher DVC positioners, ±0.5% FS positioning accuracy.

3.Fast Pneumatic Response

Air supply 20–100 psi, full-stroke response < 2s.

4.Wear-Resistant Design

HRC58–62 high-hardness alloy bearings, friction coefficient ≤0.0005, 100,000-cycle wear-free, torque deviation ≤0.05%.

product-1266-388
product-1266-388

 

Typical Product Specifications

Actual specifications may vary depending on size and spring range

Parameter

Description

Product Type

Pneumatic rotary actuator

Action

Single-acting, spring return

Control Mode

On/off or throttling (with positioner)

Rotation Angle

90°

Valve Compatibility

Ball valves, butterfly valves

Air Supply

Instrument air

Mounting

Direct mount / bracket mount

Available Styles

Style H / Style J

Applicable Industries

Oil, chemical, power, water treatment

 

Fisher 1051 vs Fisher 1052

 

Which Rotary Actuator Should You Choose?
Both Fisher 1051 and Fisher 1052 are spring-return pneumatic rotary actuators widely used for ball valves and butterfly valves.
They share a similar structure, but their control behavior and application flexibility are different.
If you're unsure which one fits your application, this quick guide will help you decide.

 

Side-by-Side Comparison

 

Feature

Fisher 1051

Fisher 1052

Actuator Type

Pneumatic rotary actuator

Pneumatic rotary actuator

Action

Single-acting, spring return

Single-acting, spring return

Primary Use

On/off control or throttling with positioner

On/off control or throttling with or without positioner

Spring Adjustability

Fixed spring

Adjustable spring

Control Precision

High (with valve positioner)

Moderate without positioner / High with positioner

Installation Flexibility

Standard

More flexible

Typical Application

Automated control loops

Simple control or cost-sensitive systems

Maintenance

Low

Low

Industry Adoption

Very high

High

 

How to Choose the Right Model

Choose Fisher 1051 if:

You are using or planning to use a digital valve positioner
High control accuracy is required
The valve is part of an automated control system
Process stability and repeatability are critical

Best choice for control valves in continuous processes.

Choose Fisher 1052 if:

You need a simpler setup without a positioner
Cost or system simplicity is a priority
The application allows spring-based throttling
Flexibility in field adjustment is required
Ideal for basic control or on/off applications.

If you can tell us:

  • Valve type (ball or butterfly)
  • Fail position (fail open or fail close)
  • Whether a valve positioner is used
  • Our engineers can quickly recommend the right model and configuration.

 

Typical Applications for Both

 

  • Oil & gas and petrochemical plants
  • Chemical processing facilities
  • Power generation systems
  • Water and wastewater treatment
  • Both models are proven, durable, and widely accepted across industries.

 

Company Strengths

1.Years of Industry Experience
Deep knowledge of Fisher actuators and valve applications across industries.


2.100% Genuine Products
No refurbished units, clear and traceable sourcing.


3.Engineer-Level Technical Support
Full support from selection and configuration to application guidance.


4.Stable Supply & Global Delivery
Serving both domestic and international customers with reliable lead times.


 

 

product-907-161

 

FAQ 

 

Q1: Can the Fisher 1051 be used for throttling control?

Yes. For precise throttling control, it is typically used with a valve positioner such as the Fisher DVC series.

Q2: What is the difference between Style H and Style J?

 The main difference is the output shaft rotation direction, which is selected to match valve orientation and fail-action requirements.

Q3: What is the typical delivery time?

Delivery time depends on the configuration. Common models are available with fast shipment - please contact us to confirm.

Q4: Do you provide warranty?

Yes. All products come with an 18-month warranty, along with technical support.

 

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