High quality/High cost performance Rubber Check Valve DIN/ISO/ANSI Pn16

Product standard
Flange connection standard:GB/T17241.6  BS EN1092-2  ASME B16.1
Structural length standard:GB/T12221  BS EN558-1 ASME B16.1
Test standard:GB/13927  BS EN12266-1  API598
technical parameter
inside nominal diameter : DN50 ~ DN300(2''~24")
Nominal pressure : PN16
working temperature : -5ºC--85ºC                                                                                        
Pressure  Testing :
-Shell : PN*1.5
-Seal : PN*1.1
Applicable medium : water ,sewage
Part Descripition 
1- Body/Bonnet: GGG40/50
2- Stem: SS420/431
3- Bolts/Nuts: SS304
4- DISC: GGG40/50 + EPDM Coating
5- Epoxy Resin coating internal & external, thickness above 300 micron
6- Flanged acc to BS4504, ISO 7005. Face to Face acc. to BS 5153,DIN 3352
7- Work pressure: PN10/16; Size range: 1",1 1/2", 2" to 24"
Dimensions(mm)

Model	Size	DN	L	D	D1	D2	n-Φd PN10	n-Φd PN16
NRS-0050	2"	50	203	165	125	99	4-Φ19	4-Φ19
NRS-0065	21/2"	65	216	185	145	118	4-Φ19	4-Φ19
NRS-0080	3"	80	241	200	160	132	8-Φ19	8-Φ19
NRS-0100	4''	100	292	220	180	156	8-Φ19	8-Φ19
NRS-0125	5''	125	330	250	210	184	8-Φ19	8-Φ19
NRS-0150	6''	150	356	285	240	211	8-Φ23	8-Φ23
NRS-0200	8''	200	495	340	295	266	12-Φ23	12-Φ23
NRS-0250	10''	250	622	405	355	319	12-Φ28	12-Φ28
NRS-0300	12''	300	698	460	410	370	12-Φ28	12-Φ28
NRS-0350	14''	350	787	520	470	429	16-Φ28	16-Φ28
NRS-0400	16''	400	914	580	525	480	16-Φ31	16-Φ31
NRS-0450	18''	450	914	640	585	548	20-Φ31	20-Φ31
NRS-0500	20''	500	978	715	650	609	20-Φ34	20-Φ34
NRS-0600	24'	600	1100	840	770	720	20-Φ37	20-Φ37