Product properties

Product name:	wet fire alarm check valve flange
Keyword:	Ductile iron flange gate valve wet fire alarm check valve flange wet fire alarm check valve assembly wet fire alarm check valve before pump Ductile iron groove gate valve Wet alarm check valve flanged
Nominal Diameter:	4"/ 5"/ 6"/ 8"
Color:	Red Powder Coated Finishing
Cover	Ductile Iron QT450-10
Seat Ring on Body	Stainless Steel 304
Seal	NRB
Bearing Bush	Brass
Spring	Stainless Steel 304
Valve Standard:	GB5135.4-2003
Materials:	ductile iron
Friction:	< 0.07Mpa
Strength Test:	2.8 -- 4.8Mpa
MOQ:	50 Pcs
Packing:	Wooden Box
Package:	1 Set/box
Production:	1000Set/month
Place of Origin:	Fujian, China

Product Description

The wet alarm valve is consisted of wet alarm, delayer and water power alarm bell. It's a common fixed fire fighting system with the function of automatic detection, alarm, and fire extinguishing. The structure is simple and it's easy and safe to operate.

Regular size

Specification

Model	DN	Pressure	Height	φD	φd	Hole QTY & DN
ZSFZ 100	100	1.6	230	220	180	8×φ18
ZSFZ 125	125	1.6	235	250	210	8×φ18
ZSFZ 150	150	1.6	245	285	240	8×φ18
ZSFZ 200	200	1.6	290	340	295	12×φ22
ZSFZ 250	250	1.6	-	405	355	12×φ28

Main Features

1. The valve body is made of heavy DI.

2. Many connecting parts are made of brass,anti-corrosion.

3. Full-inspection in each main parts(body,alarm gong,pressure switch)

4. External pressure compensatory, no block-failure as compared with internal type.

5. Extended quality warranty to 2 years.

Payment & Shipping

Packaging Details: Packing by wooden or carton box or pallet according to product's attribute.

Delivery Detail: 14-40days, based on quantity.

Payment: T/T, Alipay, L/C, Cash, Paypal, TA, Western Union, etc.

Our Service

1. Sample service;

2. Multiple size options;

3. 7*24 hours reply;

4. 2 years quality assurance;

5. OEM production;

FAQ

Q: What are your terms of payment?

A: In normal condition, 30% T/T in advance, balance before shipment. But other methods are discussable.

Q: who are we?

We are based in Fujian, China, start from 2021,sell to Eastern Asia(90.00%),Northern Europe(10.00%). There are total about 5-10 people in our office.

Q: how can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment;

The Basics of an Alarm Check Valve

At its basic core, a valve is going to help control water throughout a web standpipe system. This could be underground, but the majority of alarm check valves are used above ground, usually in buildings and high rises.

Because of the nature of water being corrosive, when it sits idle for any length of time it can increase corrosion of the pipes. The alarm check valves help to minimize this level of corrosion by limited the pressure within the pipes until such time as it's needed. Once activated, the alarm check valves will open, allowing the full pressure of water to fill the system.

A second purpose of these alarm check valves is tremendously beneficial in high rise buildings and other structures that would contain a tremendous length of piping throughout its wet pipe system. That would be to automatically control the flow of water throughout the system itself.

Should work need to be done along any point in the system, the technician would either need to manually close valves (a time consuming and problematic process the larger a building structure is) or drain the entire system of water to the point where work needs to be done (ie. Cutting or replacing piping or other valves). Using an electronically controlled system with check valves, this wouldn't be necessary.

Risks of Ignoring Alarm Check Valves

By not using alarm check valves in a sprinkler system, there are two scenarios that will play out. Either someone would need to manually open valves in order to allow water into the sprinkler system or the entire system will be under full pressure constantly, which can lead to issues in the event of surges or corrosion.

There is no reason anyone designing, building, or upgrading a sprinkler system should not consider alarm check valves, even if they are not required by law. The higher the quality of valves, the more secure the entire system will be and that not only helps to protect the investment in those buildings, but also protects those individuals who use it.

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