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Sanitary Check Valve Thread / Thread End

Features: The valves can be installed in vertical pipeline only. The min. pressure difference is 0.08bar to open the valve Flow direction is from the bottom to the top side only Asept, Non retFeatures: The valves can be installed in vertical pipeline only. The min. pressure difference is 0.08bar to open the valve Flow direction is from the bottom to the top side only Asept, Non ret

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Sanitary Check Valve Check Valve Check Sanitary Check Non Return Valve Non Return Clamped Check Valve

Product Description

Application：

The check valve opens when the pressure in the lower part of the stem exceeds the pressure on the stem and the spring force.

When the pressure on the stem is balanced, the valve will close.

A higher reverse pressure acts on the stem to close it.

ZH4 sanitary check valve has two types of structure

ZH4-1 check valve adopts clamp connection, which is economical and applicable, and is widely used in food industry.

ZH4-2 check consists of thickened valve body and two-piece method, which is characterized by easy installation and disassembly.

Working Principle

ZH4 series check valves are used in stainless steel piping systems to prevent fluid backflow.

Correct installation position of safety valve (Fig.)

Pressure drop / capacity comparison chart

Technical parameter:

Metal material	Product wetted	304L/316L (DIN-1.4307/1.4404) forged 304L/316L(1.4307/1.4404) Forged
	Non-product wetted	304(1.4301)
	We can provide EN 10204 3.1B certificate.
Seal material	Standard	EPDM
	Options	FPM 、NBR/PTFE、Silicone
	All seal materials comply with FDA 177.2600.
Temperature	Continuous working temperature	-20~+135℃(EPDM)
	Sterilization temperature	150℃(max 20min)
Pressure	Opening pressure	≈0.08bar
	Max working pressure	10bar
Surface treatment	Internal surface	Ra≤0.8μm
	External surface	Ra≤1.6μm
Connection	Connection standards	Welding end: DIN 11850 series 2
		Welding end: Inch pipe diameter standard
	Connection methods: welding, thread, clamp, flange

Clamp - threaded

Size (mm)

3A
Size	A	B	C	D
1.0" 1.5"	22.1 34.8	37.13 ACME 8TPI 50.65 ACME 8TPI	46 46	67 67
2.0" 2.5"	47.5 60.2	64.16 ACME 8TPI 77.67 ACME 8TPI	47 50	68 71
3.0" 4.0"	72.9 97.38	91.19 ACME 8TPI 119.25 ACME 6TPI	51 60	72 72
DIN
DN25 DN32	26 32	Rd52×1/6" Rd58×1/6"	60 60	81 81
DN40 DN50	38 50	Rd65×1/6" Rd78×1/6"	60 61	81 82
DN65 DN80	66 81	Rd95×1/6" Rd110×1/4"	63 63	84 84
DN100	100	Rd130×1/4"	68	89
SMS
25 38	22.5 35.5	RD40×1/6" RD60×1/6"	53 58	74 79
51 63.5	48.5 60.5	RD70×1/6" RD85×1/6"	58 62	79 83
76 101.6 Min	72.9 97.6	RD98×1/6" RD125×1/4"	66 72	83 83
101.6 Max	97.6	RD132×1/6"	72	83

Clamp - welded
Size (mm)

Inch
Size	A	B	C	D
1/2" 3/4"	9.4 15.75	12.7 19.05	28.5 28.5	39.5 39.5
1.0" 1.5"	22.1 34.8	25.4 38.1	38 38	59 59
2.0" 2.5"	47.5 60.2	50.8 63.5	38 38	59 59
3.0" 4.0"	72.9 97.38	76.2 101.6	42 44	59 55
DIN
DN20 DN25	20 26	23 29	28.5 38	39.5 59
DN32 DN40	32 38	35 41	38 38	59 59
DN50 DN65	50 66	53 70	38 38	59 59
DN80 DN100	81 100	85 104	42 44	59 55

Clamp - clamp type
Size (mm)

3A / SMS / ISO
Size	A	B	C	D
1/2" 3/4"	9.4 15.75	25.2 25.2	28.5 28.5	39.5 39.5
1.0" 1.5"	22.1 34.8	50.5 50.5	38 38	59 59
2.0" 2.5"	47.5 60.2	64 77.5	38 38	59 59
3.0" 4.0"	72.9 97.38	91 119	42 44	59 55
DIN
DN20 DN25	20 26	34 50.5	28.5 38	39.5 59
DN32 DN40	32 38	50.5 50.5	38 38	59 59
DN50 DN65	50 66	64 91	38 38	59 59
DN80 DN100	81 100	106 119	42 44	59 55