Preaction Systems

Overview

Preaction systems are specialized fire sprinkler systems that operate in conjunction with additional fire detection equipment. These systems are designed to prevent accidental water discharge while ensuring rapid and reliable fire protection in high-value or sensitive environments.

System Concept (As Provided)

When fire extinguishing systems operate with extra detection equipment, they are referred to as preaction sprinkler systems. Water is not allowed into the sprinkler piping until a fire detection event occurs, providing an additional layer of safety compared to conventional wet pipe systems.

Working Principle (As Provided)

In preaction systems, pilot lines (wet or dry) and/or electrical detection devices such as smoke detectors, heat detectors, or manual release buttons are used. Upon detection of fire conditions or activation of a sprinkler head, the preaction valve opens, allowing water to enter the system piping.

The use of extra detection devices enables earlier and more controlled system activation, reducing the risk of unwanted water release caused by mechanical damage or accidental sprinkler operation.

Purpose & Protection (As Provided)

The primary purpose of preaction systems is to prevent hazards and damage that may result from unintended sprinkler discharge or pipe rupture. This makes them especially suitable for areas containing sensitive equipment or valuable assets.

Assembly Types (As Provided)

• Flanged x Flanged
• Flanged x Grooved
• Grooved x Grooved

Installation Orientation (As Provided)

• Vertical installation
• Horizontal installation

Technical Specifications (As Provided)

• Dimensions: 1½” – 8”
• Working Pressure: 175 – 250 psi

Approvals & Certifications (As Provided)

• FM Approved
• UL Listed
• ULc Listed

Typical Applications (As Provided)

• Archives
• Computer rooms and data centers
• Libraries
• Museums

Operational Benefits

• Reduced risk of accidental water discharge
• Enhanced protection for sensitive and high-value areas
• Controlled and reliable system activation
• Compatibility with advanced fire detection systems
• Compliance with international fire protection standards