DIN Standard Check Valve

TECHNICAL SPECIFICATION
Design standard:
DIN 3356
Face to face dimension:
DIN 3202
Flanged ends:
DIN 2543-2546
Test &inspection:
DIN 3230

Product Description
CHECK VALVE
Features: (swing check valve)
1) Standard: API, JIS, DIN, BS
2) Type: Swing and Bolted cover
3) Material: WCB, CF8, CF8M, CF3, CF3M, 304L, 304, 306, 306L
4) Pressure: 150lbs-2, 500lbs
5) Size: 1 1/2"-30"
6) Face to face dimension: ANSI B 16.10
7) Flange ends to ANSI B 16.5
B. W ends to ANSI B 16.25
8) Inspection and test: API598
9) Design standard: ≤ 24in ANSI B 16.5, ≥ 26inch, API605 or MSS SP-44

Product Description
Check Valve are generally used in drip irrigation emitters and irrigation sprinklers. Composition disc valves are ideal for applications involving gritty liquids. A clapper valve is a type of check valve which is used in fire fighting. Poppet check valves find use in "macro" flow applications. Arterial check valves are used in applications requiring centrifugal pumps to prevent retrograde flow along the arterial line. Check Valves are mechanical valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens the valve, while backflow forces the valve closed. The mechanics of check valve operation are not complicated. Most check valves contain a ball that sits freely above the seat, which has only one through hole. The ball has a slightly larger diameter than that of the through hole. When the pressure behind the seat exceeds that above the ball, liquid is allowed to flow through the valve. But once the pressure above the ball exceeds the pressure below the seat, the ball returns to rest in the seat, forming a seal that prevents backflow.

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H41H-16C
Caliber (DN)	Main Connection Size
	Total Length (L)	Excircle (D)	Centre (D1)	Medium(D2)	Flange thickness	Medium Thickness	Height (H)	n-φ d
15	130	95	65	45	16	2	65	4-φ 14
20	150	105	75	58	18	2	70	4-φ 14
25	160	115	85	68	18	2	80	4-φ 14
32	180	140	100	78	18	2	85	4-φ 18
40	200	150	110	88	18	3	90	4-φ 18
50	230	165	125	102	20	3	95	4-φ 18
65	290	185	145	122	20	3	110	4-φ 18
80	310	200	160	138	20	3	130	8-φ 18
100	350	220	180	158	20	3	155	8-φ 18
125	400	250	210	188	22	3	165	8-φ 18
150	480	285	240	212	22	3	215	8-φ 22
200	600	340	295	268	24	3	280	12-φ 22
250	730	405	355	320	26	3	305	12-φ 26
300	850	460	410	378	28	4	330	12-φ 26
350	980	520	470	438	30	4	390	16-φ 26
400	1100	580	525	490	32	4	470	16-φ 30
H41H-25C
15	130	95	65	45	16	2	65	4-φ 14
20	150	105	75	58	18	2	70	4-φ 14
25	160	115	85	68	18	2	80	4-φ 14
32	180	140	100	78	18	2	85	4-φ 18
40	200	150	110	88	18	3	90	4-φ 18
50	230	165	125	102	20	3	95	4-φ 18
65	290	185	145	122	22	3	110	8-φ 18
80	310	200	160	138	24	3	130	8-φ 18
100	350	235	190	162	24	3	155	8-φ 22
125	400	270	220	188	26	3	165	8-φ 26
150	480	300	250	218	28	3	215	8-φ 26
200	600	360	310	278	30	3	280	12-φ 26
250	730	425	370	335	32	3	305	12-φ 30
300	850	485	430	395	34	4	330	16-φ 30
350	980	555	190	450	38	4	390	16-φ 33
400	1100	620	550	505	40	4	470	16-φ 36
H41H-40C
15	130	95	65	45	16	2	65	4-φ 14
20	150	105	75	58	18	2	70	4-φ 14
25	160	115	85	68	18	2	80	4-φ 14
32	180	140	100	78	18	2	85	4-φ 18
40	200	150	110	88	18	3	90	4-φ 18
50	230	165	125	102	20	3	95	4-φ 18
65	290	185	145	122	22	3	110	8-φ 18
80	310	200	160	138	24	3	130	8-φ 18
100	350	235	190	162	24	3	155	8-φ 22
125	400	290	220	188	26	3	165	8-φ 26
150	480	300	250	218	28	3	215	8-φ 26
200	600	375	320	285	34	3	280	12-φ 30
250	730	450	385	345	38	3	305	12-φ 33
300	850	515	450	410	42	4	330	16-φ 33
350	980	580	510	465	46	4	390	16-φ 36
400	1100	660	585	535	50	4	470	16-φ 39