Wafer Type Duo Check Valve

• Temperature: Ordinary Temperature
• Material: Cast Iron
• Connection Form: Flange
• Structure: Swing
• Pressure: Low Pressure
• Function: Ddcv Double Lobe
• Model NO.: H74H
• Sealing Form: EPDM, PTFE, Rubber Sealed
• Flow Direction: Stop Flow
• Standard: DIN
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Disc: Single, Dual
• Painting: Black, Blue, etc.
• Spring: SS316, Inconel-750
• Body Material: Cast Iron/Di/Ggg40/Ggg50/Wcb/CF8/CF8m
• Working Pressure: Pn10-Pn16
• Transport Package: Plywood Case
• Specification: 1 1/2" to 16"
• Trademark: Aikesen
• Origin: China
• HS Code: 8481300000
• Production Capacity: 1500 PCS/Month

Product Description

NO.	Part name	Material
		EH, AH	BH	MH
1	Body	CI DI WCB CF8 CF8M ALB	CI DI WCB CF8 CF8M ALB	WCB CF8 CF8M ALB
2	Seat	NBR EPDM VITON etc.	DI Covered Rubber	NBR EPDM VITON etc
3	Plate	DI ALB CF8 CF8M	DlALB CF8 CF8M	WCB CIF8 CF8M ALB
4	Shaft	304/316	304/316	WCB CF8 CF8M ALB
5	Spring	304		/

Main connection dimensions
Nominal diameter		D	D1	R	L	t	D2	weight(kg)
DN(mm)	NPS(inch)
50	2'	105(4.134)	65(2.559)	29.73(1.17)	54(2.12)	25(0.984)	32.18(1.26)	2,8
65	21/2"	124(4.882)	78(3.071)	36.14(1.423)	60(2.38)	29.3(1.154)	42.31(1.666)	3
80	3"	137(5.39)	94(3.701)	43.42(1.709)	67(2.62)	27.7(1.091)	66.87(2.633)	3.8
100	4"	175(6.89)	117(4.606)	55.66(2.191)	67(2.62)	26.7(1.051)	97.68(3.846)	5.5
125	Lo	187(7.362)	145(5.709)	67.68(2.665)	83(3.25)	38.6(1.52)	111.19(4.378)	7.4
150	9	222(8.74)	171(6.732)	78.64(3.096)	95(3.75)	46.3(1.823)	127.13(5.005)	10.9
200	8"	279(10.984)	222(8.740)	102.5(4.035)	127(5)	66(2.598)	161.8(6.370)	22.5
250	10"	340(13.386)	276(10.866)	126(4.961)	140(5.5)	70.7(2.783)	213.6(8.490)	36
300	12"	410(16.142)	327(12.874)	154(6.063)	181(7.12)	102(4.016)	237.9(9.366)	54
350	14"	451(17.756)	375(14.764)	179.9(7.083)	184(7.25)	89.2(3.512)	312.5(12.303)	80
400	16"	514(20.236)	416(16.378)	198.4(7.811)	191(7.5)	92.5(3.642)	351.0(13.819)	116
450	18"	549(21.614)	467(18.386)	226.2(8.906	203(8)	96.2(3.787)	409.4(16.118)	138
500	20"	606(23.858)	514(20.236)	248.2(9.72)	213(8.374)	102.7(4.043)	451.9(17.791)	175
600	24".	718(28.268)	616(24.252	297.4(11.709)	222(8.75)	107.3(4.224)	554.7(21.839)	239
750	30"	884(34.8)	772(30.39)	374(14.724)	305(12)	150(5.905)	685.2(26.976)	659

Wafer Type Duo-check Valve is to avoid unwanted back flow in a pipe.

Applications:
Water supply systems ( distribution, treatment etc. ), irrigation, heating systems, ship building, industrial processes ( liquids and gases ).

Service Temperature;
EPDM -15 C degree to +120 C degree ( Allowable temperature in continuous use -5~ +100)
NBR -10 C degree to +90 C degree ( Allowable temperature in continuous use 0~ +80)

The Duo-check valve has been designed for installation in flanged piping systems ( PN10, PN16, AS 2129 Table "E" etc. ). Suitable gaskets shall be used for sealing between valve and flanges.

Design:
- The self acting pivoting check valve of the double disc.
- Maintenance free. The design is compact and space saving.
- The superior closing response prior to flow reveal.
- The corrosion resistant springs are designed to quickly close the valve at zero flow to prevent undesirable pressure surges.
In the closed position the valve is tight shut off.
- It opens automatically when the flow starts again.
- The elastomer seat is vulcanized and bonded to the body casting.
- It is out of the flow path thus ensuring extended seal life. Spherical profiling of the seat ensures positive shut-off even at low pressures
And the area adjacent to the seat is also protected by the same elastomer material.
- Attention paid to the streamlining of the flow path is paramount if good flow characteristics are to be achieved.
- The saving of energy costs by selecting a check valve may be several times the initial cost of the valve.
- The use of these design features together with careful material selection makes a product with a high reliability and a low operating cost
s.