DIN/GB Flanged DN100-200mm 4′′-8′′ Wet Alarm Check Valve

• Customization: Available
• Sprinkler Installation: Ordinary
• Sprinkler Head Type: Closed
• Model NO.: ZSFZ
• Alarm Valve Type: Wet Alarm Valve
• Automatically Opened and Closed Repeatedly: Can Automatically Open
• Open Fire Sprinkler System Type: Water Spray System
• Closed Fire Sprinkler System: Wet Fire Sprinkler System
• Wet Alarm Valve Structure: Seat Type
• Alarm Valve Diameter: DN100/150/200mm
• Certificate: Cccf, CNAS, ISO
• Transport Package: Wooden Case/Carton Box
• Specification: 4′′, 6′′, 8′′
• Trademark: Longdu/OEM
• Origin: Cn
• HS Code: 8481809000
• Production Capacity: 500000PCS/Year

Product Description

Introduction of  the wet alarm valve

Before we introduce the wet alarm valve, we should learn the Wet Pipe Sprinkler Systems, It constantly contains water in them, which allows for a quick reaction to a fire and is the most common type of sprinkler system installed in buildings(high-rise or office building with a few floors). This sprinkler system is cost efficient and low maintenance.

Wet Alarm Check Valve is the core device in wet pipe sprinkler systems. It serves a dual purpose which prevents a reverse flow of water (non-return) and also activates the use of the water motor alarm. Meanwhile, in the event of variable pressure conditions, false alarm is prevented with provision of retard chamber at the external bypass.

The installation type can be flange or groove type.

How does it work

It is opreated with flow indicator, signal valve, pressure switch, sprinklers etc. to constitute a widely used wet automatic fire extinguishing system. The system is always standing by with pressure water suffusing the pipes, activated automatically when a fire breaks out and the sprinklers function.

Advantage: It can put out fire timely with high efficiency.

Disadvantage: the pipes are always filled with pressure water, so it may destroy the indoor environment if the pipe leaks, thus this system is applicable to temperature range 4ºC~70ºC(39.2F~158F), or it may freeze or leak.

Flange Type&Specs.
D=flange outer diameter; K=bolt hole diameter; L=bolt diameter; n=bolt hole number; C=flange thickness
Our Advantages

1. Manufacturer direct supply with reasonable price.

2. Fully assembled in factory and convenient for customers to install.

3. Strict quality check before export.

4. Customized OEM order is accepted.


5. Technical support available.
6. Wide product range of foam system and water sprinkler system.
Details show:

Packing reference

FAQ

1. Are you a manufacturer or a trading company?
- Manufacturer, 100%, located in Nan'an City, Quanzhou, Fujian Province, China.

2. Can we pay a visit to your factory?
- Sure, we warmly welcome all customers to inspect our factory.

3. What products do you manufacture?
- Wide product range of fire fighting foam system and fire sprinkler system, such as foam bladder tanks,  foam concentrates, fire hoses, sprinkler heads, hydrants, gate valves, alarm valves and so on. 

4. What is your sample policy?
- For small items, we offer FREE SAMPLES for sample evaluation purpose, but customers need to pay for the shipping; For large and heavy items, we charge for the samples, but the charge will be refunded to customer when the order quantity reaches certain amount. 

5. What is your payment method?
- T/T, L/C, Paypal, Western Union etc. 

6. What is your delivery time?
- We have READY STOCK of some products(such as sprinkler heads, hoses, hydrants etc.), which allows for quick delivery within a week,  for other items or OEM orders, the delivery time is normally within one month. The quicker the payment from you, the sooner the delivery time will be:)

7. Which is your loading port from China?
- Xiamen port by sea or by air, and this year we are going to launch a NEW PLANT in Shandong province, so some products may ship from Rizhao or Qingdao port.