Forede 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. Flange Standard Adaptation Challenges

Q: If a project uses ANSI - standard flanges instead of BS4504, what solutions ensure a proper seal with the ZSFZ valve?
A: Use transition flanges or adapter rings that bridge BS4504 and ANSI dimensions. Verify the adapter's pressure rating (≥PN16) and material compatibility (e.g., ductile iron for the valve, matching alloy for the adapter). Conduct a pressure test post - installation to confirm no leaks.

2. Galvanized Pipe Longevity

Q: How does the galvanized pipe line's lifespan compare to stainless - steel alternatives in the ZSFZ system?
A: Galvanized pipes have a shorter lifespan (15-20 years) than stainless steel (30+ years) in harsh environments. However, they offer cost - effectiveness for indoor, low - corrosion settings. For coastal or chemical - prone areas, consider retrofitting with stainless - steel lines or frequent galvanization repairs.

3. Pre - Action System Integration Feasibility

Q: Can the ZSFZ valve work in a pre - action sprinkler system without compromising air tightness?
A: Yes, but it requires modifying the retard chamber to prevent air leakage. Install an air - sealing diaphragm or a pre - action - specific retard chamber. The water motor gong must also be compatible with low - pressure air signals during the pre - action standby mode.

4. Ductile Iron Corrosion Mitigation

Q: What proactive steps prevent rust on the ductile iron body in high - humidity spaces like data centers?
A: Apply a two - part epoxy coating (matching the valve's red color) every 5 years. Install dehumidifiers near the valve to keep humidity below 60%. Use sacrificial anodes (if underground) to divert corrosion currents away from the valve body.

5. Flow Switch Signal Range Optimization

Q: How to extend the DC 24V flow - switch signal beyond 150 meters without degrading performance?
A: Use a 24V - to - fiber optic converter to transmit the signal over long distances (up to 2 km) with no loss. At the receiving end, convert back to DC 24V using a fiber - to - electrical module. This avoids voltage drop in copper cables for ultra - long runs.

Order Information

 

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