Hayward Pneumatic Valve Actuators

Hayward offers robust pneumatic rack and pinion actuators in double-acting (PMD Series) and spring-return (PCS Series) configurations. These corrosion-resistant actuators provide reliable performance for ball and butterfly valves, with ISO 5211 mounting, Namur-style solenoid and top-works interfaces, and lightweight designs.

Double-Acting vs Spring-Return Overview

• Double-Acting (PMD Series) — Air-to-open and air-to-close. Ideal for applications requiring powered operation in both directions. Fast cycle times (typically ~0.5 seconds).
• Spring-Return (PCS Series) — Fail-safe design (air-to-open, spring-to-close or vice versa). Provides reliable shut-off in case of air or power loss.

Series Comparison & Selection

Use the table below to quickly compare the main pneumatic actuator series. Refer to the valve selection charts in the datasheet for specific sizing.

Series	Type	Typical Valve Sizes	Key Features
PMD Series	Double-Acting	Ball up to 2", Butterfly up to 3"	Thermoplastic housing, lightweight, Namur mounting, fast cycle (~0.5 sec)
PCS Series	Spring-Return	Ball & Butterfly up to 8"	Fail-safe spring return, epoxy-coated aluminum options, position indicator

PMD Series Double-Acting Pneumatic Actuators

Designed for ball valves up to 2" and butterfly valves up to 3". Features a corrosion-resistant thermoplastic (polyamide) housing and permanently lubricated rack and pinion design.

Key Features

• Double Acting Air-to-Open and Close
• Corrosion-Resistant Thermoplastic Housing
• Permanently Lubricated Rack and Pinion
• Manual Override
• Two-Piston Rack and Pinion Design
• Namur-Style Top-Works and Solenoid Mounting
• Position Indicator
• Lightweight Design
• ISO5211 Mounting Base

Technical Specifications

• Housing: Polyamide
• Output Shaft: Carbon Steel, Nickel Plated
• Air Pressure Range: 80–120 PSI
• Seals: Nitrile
• Cycle Time: Approximately 0.5 seconds (typical)
• Air Port Connections: 1/4" NPT

PCS Series Spring-Return Pneumatic Actuators

Fail-safe spring-return actuators suitable for ball and butterfly valves up to 8". Available in multiple sizes (PCS15 through PCS45) with increasing torque output.

Key Features

• Spring-Return Fail-Safe Operation
• Epoxy-Coated Aluminum or Thermoplastic Options
• Position Indicator
• ISO 5211 Mounting
• Fast Cycle Times (under 1 second typical)
• Rack and Pinion Design

Common Options (Across Series)

• Solenoid Valves (various voltages)
• Declutchable Manual Override
• Auxiliary Limit Switches
• Cycle Speed Control
• Positioners

Valve Compatibility

Compatible with Hayward TB/TBH, TW/LA, and BYV Series valves (and many alloy valves via ISO 5211). Actuator sizing is based on clean water at 70°F — consult the datasheet or contact us for specific recommendations.

For complete model selection charts and dimensions, refer to the Pneumatic Actuators datasheet.