Sanitary check valve also known as one-way valve, its role is to prevent the pipeline water back in the media. 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.
sanitary check valve performance parameter:
Applicable medium: water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and so on,
Connection: flange, butt welding, thread, socket welding.
Valve body and disc materials: AISI 304 or AISI 316L, 304L and 316 materials
Adamant valves can manufacture sanitary check valve according to your requests.
Application
Sanitary check valve, also known as "non-return valve", is designed for use in process piping installations to prevent reverse flow.
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) for choose from, all complying with FDA 21CFR177.2600.
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.
Working Principle
A check valve opens when the pressure below the valve plug exceeds the pressure above the valve plug and the spring force. The valve close when pressure equalization has been achieved. The below picture shows the right installation:
| Technical Parameters | |||
| Steel material | Product wetted steel parts | AISI 304 or 316L (1.4306 / 1.4404) | Provided with material inspection report |
| Other steel parts | AISI 304 | ||
| Seal material | Standard | EPDM | All seal materials comply with FDA 21CFR117.2600 |
| Options | VMQ (Silicone) or Viton (FPM) | ||
| Pressure | 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") | ||
| Temperature | Working temperature | 14 ~ 248°F (-10 ~ 120°C) with EPDM seat. | |
| Surface treatment | Inside surface treatment | Ra 16 ~ 32µin (0.4 ~ 0.8µm) | |
| Outside surface treatment | Ra 32 ~ 64µin (0.8 ~ 1.6µm) | ||
| Connection | End connections can be butt-welded, sanitary clamp, threaded or others upon request. | ||
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