Forede Fire Protection Alarm Check Valve for Fire Sprinkler System

• Customization: Available
• Sprinkler Installation: Pendent;Upright;Sidewall
• Sprinkler Head Type: Closed
• Model NO.: ZSFZ
• Alarm Valve Type: Wet Alarm Valve
• Automatically Opened and Closed Repeatedly: Can Automatically Opened and Closed
• Open Fire Sprinkler System Type: Deluge System
• Closed Fire Sprinkler System: Wet Fire Sprinkler System
• Dry Alarm Valve Type: Differential Type
• Wet Alarm Valve Structure: Seat Type
• Alarm Valve Diameter: 2.5"Thru 10"/DN65 Thru DN250
• Nozzle Flow Coefficient: 115
• Deluge Valve Type: Diaphragm Type
• Product Name: Alarm Valve,Alarm Check Valve
• Installation: Vertical
• Finish: Externally Powder Coated
• Medium: for Most Water, Seawater & Brackish Water Supplies
• Connection: Flange X Flange / Groove X Groove
• Rated Pressure: 232psi/1.6 MPa/16 Bar
• Listings and Approvals: Cccf,ISO9001, ISO14001
• Application: Automatically Actuate Electric and/or Hydraulic Al
• OEM: Workable
• Transport Package: Wooden Case
• Specification: 65*50*50
• Trademark: FOREDE
• Origin: Fujian, China
• HS Code: 8481804090
• Production Capacity: 500sets/Month

Product Description

Product Description

ZSFZ Model Wet Alarm Check Valves

The ZSFZ Model Alarm Check Valves are designed for use in applications where the temperature is maintained above freezing and intended for use in wet pipe (automatic sprinkler) fire protection systems. They are installed vertically,and they are designed to automatically actuate electric and/or hydraulic alarms when there is a steady flow of water into the system that is equivalent to the discharge rate of one or more sprinklers.

The wet alarm valve is mainly composed of a valve body, a valve seat, a valve disc, a sealing gasket, a connecting rod, an annular groove bypass connecting pipe, and a pressure gauge connection pipe. The wet alarm valve should be installed on the main standpipe of the sprinkler system, and the installation height should be in accordance with the design and standard network collection requirements, and the drain pipe should not be connected to the drainage system only. The drain funnel should be connected to the nearby drain point. The matters needing attention during installation and operation of the wet alarm valve are as follows. 1. When installing the wet alarm valve, pay attention to the direction of the valve body. And carry out pipeline flushing before installation to avoid sedimentation of mud, sand and dirt, and to prevent blockage of the annular groove. 2. During installation, if it is found that even if the wet alarm valve is closed, there is still water flowing out of the drain port of the delayer, indicating that the valve flap is not tightly sealed and should be checked, repaired or updated. 3. The working status of the alarm system should be checked regularly. Generally, water can be discharged through the end test device of the automatic sprinkler system to confirm whether the pressure switch, hydraulic alarm bell and wet alarm valve are normally watered. 4. Frequently check whether the pipeline system is blocked. The inspection method is: close the valve on the pipeline to the delayer and hydraulic alarm bell, and open the ball valve of the main drain pipe. If a large amount of water flows out, the pipeline is unobstructed.

Specification

ZSFZ series Alarm Check Valve

Features:

Ductile Iron body
Galvanized pipe line
Carbon Steel Retard Chamber
Carbon SteelWater Motor Gong

Specification
Model	ZSFZ80	ZSFZ100	ZSFZ125	ZSFZ150	ZSFZ200	ZSFZ250
Size	3"/DN80	4"/DN100	5"/DN125	6"/DN150	8"DN200	10/DN250
Connection	Flange @ BS4504
Working Pressure	PN16/16bar
Testing Pressure	32 bar
Flow Switch	DC 24V.0.5

 

Packaging & Shipping

 

 

FAQ

1. Function of the Retard Chamber

Q: What role does the Carbon Steel Retard Chamber play in the ZSFZ series alarm check valve?
A: The Carbon Steel Retard Chamber acts as a flow - stabilizing component. It delays the water flow briefly when the system starts working, filtering out short - term pressure changes (like water hammer). Only continuous water flow (caused by actual sprinkler activation) can trigger the alarm, preventing false alarms.

2. Operation of the Water Motor Gong

Q: How does the Carbon Steel Water Motor Gong generate an alarm signal?
A: When water flows through the valve (due to sprinkler activation), it powers the water motor. The motor then sets the gong in motion, creating a loud sound. This sound alerts building occupants and emergency responders that the sprinkler system has been activated.

3. Impact of Valve Size on Performance

Q: How does the size of the ZSFZ series valve (e.g., 3"/DN80 vs. 10"/DN250) affect its use in fire protection systems?
A: Larger valves (e.g., 10"/DN250) can handle higher water flow rates, making them suitable for large - scale applications such as industrial warehouses. Smaller valves (e.g., 3"/DN80) are designed for smaller areas like office buildings. Although all sizes can operate at a working pressure of PN16, their maximum flow capacities differ based on their diameters.

4. Significance of Testing Pressure

Q: Why is the testing pressure (32 bar) higher than the working pressure (16 bar) for the ZSFZ series valve?
A: The 32 - bar testing pressure is used to check the valve's ability to withstand extreme pressure during regular system tests (such as hydrostatic testing). It ensures that the valve is leak - free and structurally sound even under conditions more severe than normal operation, ensuring its reliability in case of a fire.

5. Role of the Flow Switch

Q: What function does the DC 24V, 0.5 - rated Flow Switch serve in the ZSFZ series valve?
A: The flow switch detects water movement through the valve. Once activated, it sends a DC 24V signal to connected systems like fire alarm panels. This enables automated actions, such as alerting remote monitoring centers or activating additional fire - suppression measures.

Order Information

 

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