Tunnel Foam Spray Valve Assembly

1. Product Overview

The Tunnel-specific Foam Spray Control Valve Assembly is a key component of the Tunnel-specific foam spray firefighting system. It can be activated immediately upon receiving control signals from the fire alarm controller, mixing firefighting water from the system main pipeline and foam concentrate from the foam liquid pipeline to form a 3% water film foam mixture, which is delivered through the pipeline network to the Tunnel-specific water film foam spray head to extinguish Tunnel fires.

2. Product Features and Advantages

(1) The control valve assembly is a component that integrates rain and dripping valves, proportional mixers, balance valves, and other components. It has a compact structure, diverse functions, convenient operation, and beautiful design. It can adapt well to the control requirements of Tunnel-specific systems.
(2) The valve assembly and control linkage can quickly and effectively handle fire signals and control the operation of firefighting devices.
(3) The system has three startup modes: automatic control, manual control, and emergency operation.
(4) Safe and reliable, easy to operate.
(5) The compact structure, novel appearance, convenient installation, and excellent performance of this control valve assembly can fully meet the requirements of the tunnel environment. It can maintain a stable mixing ratio even when the pressure difference between foam liquid and water is large (0.1MPa~0.7MPa) at different locations in the tunnel, and it is suitable for a wide range of pressure and flow. It is suitable for both single-lane and double-lane tunnels.

3. Product Structural Parameters

1. Product Composition
The Tunnel-specific foam water spray firefighting system consists of a balanced pry block, control valve assembly, atmospheric pressure tank, and spray head. The main components include electric motors, foam liquid pumps, balance valves, rain and dripping alarm valves, signal butterfly valves, solenoid valves, proportional mixers, pressure switches, hydraulic warning bells, control valves, and pipelines.

Main Performance Parameters
1) foam mixture supply intensity q=6.5L/min.m2
2) foam spray duration t≥30mins
3) foam liquid model 3%AFFF water film
4) foam mixing ratio 3%
5) Tunnel-specific foam spray head minimum working pressure 0.35MPa
6) System response time≤40s
3. Tunnel-specific foam spray head