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| Categories | Sanitary Check Valves | 
|---|---|
| Brand Name: | NYHAU | 
| Certification: | 3A,CE,ISO,FDA | 
| Place of Origin: | KunShan,China | 
| MOQ: | 1PC | 
| Price: | Negotiable | 
| Payment Terms: | L/C, D/P, D/A, T/T, Western Union, MoneyGram | 
| Supply Ability: | 10000PCS/Mouth | 
| Delivery Time: | 5-8 work days | 
| Packaging Details: | Export Standard Packing(Shrink Wrapped, Reusable Bag, Paper Carton,Plywood) | 
| Application: | Industrial Usage, Water Industrial Usage | 
| Materials: | AISI 316L | 
| Type: | Stainless Steel Check Valves | 
| Connection Type: | Tri Clamp | 
| Diameter: | 1/2"-6" | 
| Specifications: | 3A ASME BPE | 
| Company Info. | 
| Nyhau Fluid Equipment Co.,Ltd | 
| View Contact Details | 
| Product List | 
3A Hygienic Check Valve , Non Return Check Valve High Sealing Function
Specification:
Sizes are available from 1/2" to 4" (1/2", 3/4", 1”, 1 1/2", 2", 2
1/2", 3", 4")
DN15 to DN100 (DN15, DN20, DN25, DN40, DN50, DN65, DN80, DN100)
Valve body can be AISI 304 or AISI 316L.
Valve seat: EPDM, VMQ (silicone), Viton (FPM).
End connection can be butt-welded, sanitary clamp, threaded or
others upon request.
Max. working pressure: 145psi (10bar)
Opening pressure: 4.5psi/0.3 bar (DN25/1"), 3 psi/0.2 bar
(DN32/0.75" to DN40/1.5"), 1.5 psi/0.1 bar (DN50/2" to DN100/4")
Working temperature range: 14 ~ 248°F (-10 ~ 120°C) with EPDM seat.
Surface treatment: Ra 32μin (0.8μm) as default, others available
upon request.
| General Specifications of Sanitary Check Valve | ||
| Working Pressure | Working Pressure | 0~10 bar | 
| Opening Pressure | 0.1~0.3bar | |
| Working Temperature | Continuous Working Temperature | -10°C ~ +121°C(EPDM) | 
| Sterilization Temperature | 150°C (Max 20min) | |
| Surface Finish | Internal Surface Finish | R0.8m | 
| External Surface Finish | R1.6m | |
| Connections | Connection Standards | DIN, SMS, 3A, ISO | 
| Connection Methods | Welding, Clamp, Threading | |
| Material | ||
| Metal Material | Product Wetted | 304 (1.4301) or 316L (1.4404) forged | 
| Other Steel Parts | 304 (1.4301) | |
| EN 10204 3.1B certificate is available on request. | ||
| Seal Material | Standard | EPDM | 
| Options | FPM, Silicone, NBR | |
| All seal materials comply with FDA 177.2600. | ||
Strength:
Quality & Inspection:
Design:
Features:
• various end connections available
• sizes from ½" thru 4"
• operating temperature range: 15°F to 200°F
• maximum operating pressure: 145 PSI
• 3A authorized 58-00
• full size flow plate
• long stem bushing for increased cycle life
• suitable for low and medium viscosity fluids
• field serviceable (no special tools required)
Are different to many other types of valves,for check valves work
automatically and most are not controlled by a person or any
external control. Accordingly, most do not have any valve handle or
stem. Thus there is an important concept in check valves, it is,
the cracking pressure. Cracking pressure is the minimum upstream
pressure at which the valve will operate. So the check valve is
designed for and can therefore be specified for a specific cracking
pressure.
Clamp Check Valve Sizes & Dimensions

| Size (Tube OD) | Dimensions | Cracking 
 | Flow Coefficient (CV) | |||
|---|---|---|---|---|---|---|
| A | B | C+D | ||||
| 1/2″ | 0.037 | 0.990 | 1.100 | 2.7 | 5 | |
| 3/4″ | 0.620 | 0.990 | 1.100 | 2.7 | 4 | |
| 1 “ | 0.870 | 1.990 | 4.189 | 1.6 | 20 | |
| 1-1/2″ | 1.370 | 1.988 | 4.189 | 1.6 | 20 | |
| 2 “ | 1.870 | 2.519 | 4.583 | 1.4 | 40 | |
| 2-1/2″ | 2.370 | 3.051 | 4.740 | 0.9 | 60 | |
| 3 “ | 2.870 | 3.582 | 4.976 | 0.5 | 100 | |
| 4 “ | 3.834 | 4.682 | 5.583 | 0.5 | 210 | |
| 6 “ | 5.782 | 6.630 | 6.260 | |||

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