Name: 300X type slow-close check valve
Brand: DUNHUI
Availability: InStock

Product Details

The best quality and faith bring us the good market, such as USA, CANADA, BRAZIL, AUSTRALIA, UK, GERMANY, ITALY, SPAIN, TURKEY, ALGERIA, DUBAI, RUSSIA, UKRAINE, SINGAPORE, MALAYSIA etc. “Made in DUNHUI” in many Countries.

“DUNHUI” is your correct choice. Welcome to visit

1. 300X type slow-close check valve

2. Main performance indicators

PN(Mpa)		1	1.6	2.5
DN(mm)		20-800	20-800	20-800
Test pressure	Sheal	1.5	2.4	3.75
(Mpa)	Seal	1.1	1.76	2.75
Min pressure of motion(Mpa)		≥0.07

3. Product drawings

4. Main Dimensions

DN	L	A	A1	H	H1	F
20	180	282	200	172	106	116
40	240	320	210	265	210	170
50	240	320	210	265	210	170
100	360	410	230	460	305	275
150	455	430	260	570	415	355
200	585	440	280	695	510	460
300	800	460	320	905	658	580
400	1075	480	360	1080	735	715
500	1075	580	420	1135	665	830
800	1750	830	530	1640	925	1050

5. Inspection Process

6. Valve total picture

7. Technical Standard:

Design: EN593
Face to face: EN558-1

Flange drilling: EN1092
Upper flange connection: ISO 5211

8. Personnel station:

Have professional salesmen, and 6 Engineers, More than 30 inspectors.

9. Quality and Safety:

We have a very strict and complete quality control system, which promises that goods we produced are always of the best quality, the enough inspectors to ensure that each product can meet the quality requirements of customers. We do the final inspection in own factory with ISO 9001:2008.

10.Location:

DUNHUI has a convenient location at the city’s exporting business zone, Dongli District. We are only 19 km to Tianjin International Airport, and very close to major highways,TIANJIN port. We look forward to work with your business!