Deluge Alarm Valve

Size: 2″-12”(DN50-DN300)
Material: Ductile iron ASTM A536, 65-45-12
Dimension: GB 5135.5,BS EN 558
Connection:BS EN 1092-2
Pressure Rating: PN10/16
Temperature: 0-80 ℃
Surface Treatment: ANSI/AWWA C550
Certificate: UL Listed / FM Approved
Medium: Water, gas etc.

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Product Description

Products Details

What’s the Deluge valve?

Deluge valve is mainly used in high flow deluge system. It is a diaphragm valve to automatically control the system water flow, and it actuates upon the wet pilot line, dry pilot line, electrical signal, and emergency manual release. Alarm check valve is mainly used in wet pipe fire protection system, which prevents the reverse flow and controls water pressure. It automatically actuates alarm when water flows into the system upon fire sprinkler operation.Alarm valves include wet alarm valves, pre-action alarm valves, and dry alarm valves. The wet alarm valve is a one-way valve that only allows water to flow into the sprinkler system in one direction and alarms at the specified flow rate. The wet alarm valve usually has the same water pressure before and after the disc (the water passes through the water pressure balance hole in the guide pipe to maintain the balance of the water pressure before and after the disc). The working principle of the alarm valve: Due to the difference between the self-weight of the valve disc and the total pressure of the water before and after the valve disc, the valve disc is in a closed state (the total pressure on the valve disc is greater than the total pressure below the valve core). When a fire breaks out, the closed nozzle sprays water. Since the water pressure balance hole is too late to replenish water, the water pressure above the alarm valve drops. At the same time, the water enters the delay device, pressure switch, hydraulic alarm bell and other facilities along the annular groove of the alarm valve, and sends out a fire alarm signal and starts the fire pump.

Product Drawing

Part No. Part Standard   Specification
1 Valve Body ASTM A536,   65-45-12
2 Main Gasket EPDM
3 Gland of Main   Disc ASTM A536,   65-45-12
4 Seat AISI 304
5 Main Disc ASTM A536,   65-45-12
6 Spring Stainless Steel   4Cr13
7 Stem AISI 304
8 Bushing Brass H62
9 Middle Bonnet ASTM A536,   65-45-12
10 Diaphragm EPDM
11 Bolt AISI 304
12 Up Gland ASTM A536,   65-45-12
13 Bottom Gland ASTM A536,   65-45-12
14 Up Bonnet ASTM A536,   65-45-12
15 Cap Plug Brass H62


DN Dimensions(mm)
Inch mm L H D D1 b n-   ΦL
2″ 50 206 170 152 120.5 16 4- Φ19.1
2.5″ 65 211 195 178 139.5 17.5 4- Φ19.1
3″ 80 249 215 191 152.5 19 4- Φ19.1
4″ 100 320 255 229 190.5 24 8- Φ19.1
6″ 150 414 360 279 241.5 25.5 8- Φ22.2
8″ 200 500 450 343 298.5 28.5 8- Φ22.2
10″ 250 605 550 406 362 30.5 12- Φ25.4
12″ 300 724 645 483 432 32 12- Φ25.4
14″ 350 734 700 533 476 35 12- Φ28.5
16″ 400 991 790 597 540 36.5 16- Φ28.5


Quality Control

Advanced equipment guarantee the production of high quality products.
Advantages of DISA moulding line:1. High quality precise casting less scrap and lower finishing costs. 2.High Production Efficiency(1)Fast production: 350 moulds per hour, pattern changing time cut down to 2-3 minutes
(2).higher profitability over a longer service life. 3. Safety and Environmental Friendly safe, easy and clean operation (CE and ISO 14001 compliant)
High-precision, hydraulicly driven mould transport,no shifting, distortion, ordisplacement of moulds.
The advantage of the sand supply system:The sand supply system is from the best class sand processing equipment manufacturers of China, with straight structure, easier maintenance, environmently friendly, high degree of automation, high safety factor, good parameters of sand stability.

Fluid Tech is honored as the National enterprise technical center and is capable and qualified to conduct full series of tests and inspections including chemical checking, etc. Inspection facilities include:spectrometer, carbon sulfur analyzer, metallurgical microscope, tensile strength testing equipment, pressure testing equipment, adhesive force testing equipment, CMM, hardness tester, etc.From incoming inspection to finished product, quality is checked a
nd monitored in the whole process. Each step of the manufacturing process is carefully documented, regularly reviewed for revision control and updatin
g standard. Quality procedures are constantly monitored and updated to assure that only the highestand most consistent quality products are supplied to our valued customers.

Application and Case

Deluge Alarm Valve are used in fire protection system, HVAC system, plumbing, gas system etc.Fire Protection Alarm Valve are used in many projects , such as China Taiwanese Building 101, Xiamen Building,Wuhan Expo Building and other famous landmark projects.