Fire Fighting Used Alarm Check Valve

• Customization: Available
• Media: Water
• Certification: CCC, ISO, CE
• Model NO.: 200X
• Temperature: Ordinary Temperature
• Connection: Flange
• Valve Seat: Double-Seat
• Structure: Spring Diaphragm
• Material: Cast Iron
• Color: Blue or Customized
• Pn: 10 16 150lb 300lb
• DN: 50-3200mm
• Design: Cast / Forged
• Operator: Manual / Electric Acuated / Pneumatic
• Sealing: EPDM / NBR / PTFE / Viton / Stainless / Stelliete
• Spray: 250 Micron
• Transport Package: Wooden Case
• Specification: Ductile iron material
• Trademark: BH
• Origin: China
• HS Code: 8481804090
• Production Capacity: 5000PCS/Year

Product Description

Fire fighting used Alarm Check Valve 

Purpose
Adjust and control the outlet pressure of the master valve.The said pressure will not be changed along with the change with the inlet pressure,neither along with the change of the flow on the master valve outlet.Applicable for the living water supply,fire fighting system and industrial water supply system.
Features
With the full-channel streamline design,this valve holds a small fluid resistance and a great flow and can reduce either dynamic or static pressure.
Principle 
He medium,when enters the lower cavity of the body,pushes the disc upward and,at the same time,the medium enters the upper cavity of the diaphragm via the control pipe outside of the master valve.The upper cavity pressure is adjusted by the pilot valve.The pressure difference between the upper and lower cavities decides the up-and-down movement of the disc so as to change the outlet pressure.When the pressure of both cavities are identical,the disc stops at a some position and the outlet pressure is kept unchanged,acting at stabilizing the pressure.
Executive standard
Size of flange:GB/T 17241.6
Test and inspection:GB/T 13927


Main Dimensions  

DN	Length	Main dimension
		0.6MPa			1.0MPa			1.6MPa			2.5MPa
mm	L	D	D1	n-d	D	D1	n-d	D	D1	n-d	D	D1	n-d
50	200	140	110	4-14	165	125	4-18	165	125	4-18	165	125	4-18
65	220	160	130	4-14	185	145	4-18	185	145	4-18	185	145	8-18
80	230	190	150	4-18	200	160	8-18	200	160	8-18	200	160	8-18
100	265	210	170	4-18	220	180	8-18	220	180	8-18	235	190	8-22
125	295	240	200	8-18	250	210	8-18	250	210	8-18	270	220	8-26
150	335	265	225	8-18	285	240	8-22	285	240	8-22	300	250	8-26
200	385	320	280	8-18	340	295	8-22	340	295	12-22	360	310	12-26
250	465	375	335	12-18	395	350	12-22	405	355	12-26	425	370	12-30
300	545	440	395	12-22	445	400	12-22	460	410	12-26	485	430	16-30
350	610	490	445	12-22	505	460	16-22	520	470	16-26	555	490	16-33
400	650	540	495	16-22	565	515	16-26	580	525	16-30	620	550	16-36
450	730	595	550	16-22	615	565	20-26	640	585	20-30	670	600	20-36
500	800	645	600	20-22	670	620	20-26	715	650	20-33	730	660	20-36
600	920	755	705	20-26	780	725	20-30	840	770	20-36	845	770	20-39

Q: Are you trading company or manufacturer ?
A: We are factory Located In Tianjin, China.
Q: What's your product range?
A: We produce Butterfly valve, Gate valve, Check valve, Y strainer ,Water Controlling Valve and other Pipe Accessories .
Q: What's Execution Standard?
A: ISO/ANSI/DIN/JIS/ EN/GOST/AS standard.
Q: What's your Strong product ?
A: Centre Line Butterfly valve, Eccentric Butterfly valve ,Resilient Seat Gate valve, and largest size to DN3200 .
Q: How long is your delivery time?
A: Generally it is 10 days if the goods are in stock. or it is 35 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=10000USD, 100% in advance. Payment>=10000USD, 30% T/T in advance ,balance before shipment.