What is the Alarm check valve?
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.
| Part No. |
Part |
Standard Specification |
Options |
| 1 |
Valve Body |
ASTM A536, 65-45-12 |
|
| 2 |
Bonnet |
ASTM A536, 65-45-12 |
|
| 3 |
Pin |
AISI 304 |
AISI 316 |
| 4 |
Hex Bolt |
Carbon Steel Zinc Plated |
|
| 5 |
Gasket |
EPDM |
NBR |
| 6 |
Hex Bolt |
AISI 304 |
AISI 316 |
| 7 |
Gland |
Brass H62 |
|
| 8 |
Seat |
C89833 |
|
| 9 |
O-Ring |
NBR |
EPDM |
| 10 |
Gasket |
EPDM |
|
| 11 |
Disc |
C89833 |
|
| 12 |
Plug |
AISI 304 |
AISI 316 |
| 13 |
Spring |
AISI 321 |
|
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.
Products are used in fire protection system, water system, HVAC system, plumbing, gas system, irrigation system, etc.These products are used in many projects , such as China Taiwanese Building 101, Xiamen Building,Wuhan Expo Building and other famous landmark projects.
1. What is the minimum quantity of the order?
Answer: The purchase volume of mixed products is 4 tons
2. How long is the delivery time of the order?
Answer: The delivery time for general orders is about 30 days. If the order is urgent and we have stock, around 7 days.
3. What payment methods do you accept?
Answer: We accept payment terms such as TT, L/C, DP, Western Union, Paypal, etc.
4. Where is your departure port of shipment? Is it possible to deliver to the designated warehouse?
Answer: The port of departure of our goods is generally Tianjin Port or Qingdao Port. We can transport the goods to designated warehouses, such as Yiwu, Guangzhou, etc.
5. What certificates do your products have?
Answer: Our products have FM/UL certificates, and we cooperate with third-party quality inspection certification before the factory, such as SGS,TUV
6.What are the series of your products?
Answer: Our products are divided into heavy series, medium series and light series according to different markets and standards. In order to buy more competitive products for you, please communicate your purchasing needs with the salesperson.
7. Do product packaging cartons and labels support customization?
Answer: Packaging cartons and labels can be customized according to customer requirements.
8.Does the purchased product support customization?
Answer: The product supports customization, but there are purchase quantity requirements and mold costs. For details, please consult the salesperson.
9.What are the packaging methods of the product?
Answer: The packaging of the product includes carton packaging, pallet packaging, wooden box packaging, and woven bag packaging.
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