PHARMACEUTICAL OVERFLOW SEAT VALVE NLS

Application

The NLS valve is an overflow pneumatically actuated single seat valve designed for the pharmaceutical industry.
It is widely used as a bypass valve for the positive displacement pumps, it is also used to protect the equipment in case of excessive pressure.
It is widely used in the loops of purified water (PW) or water for injections (WFI).The valve is normally installed at the end of the line to maintain pressure at the end of the loop. As a result, the points of use in this area are provided with pressure. These valves are also used to prevent pump cavitation by creating a counterpressure during acceleration when the end-of-line flow rate is not sufficient.

Operating principle

The spring pressure forces the valve to close, the pressure can be adjusted by a screw on the top of the valve.
When the configured pressure is exceeded, the valves opens.
The valve is provided with a pneumatic seat lift, it allows the CIP liquid pass through during the CIP process.

Design and features

Sanitary design according to 3A standards.
360º adjustable body.
Compact design.
Pneumatic seat lifter.
Pressure range: 0 to 6 bar.
Easy assembly/disassembly by loosening the clamp.
Standard connections: Clamp OD.
Traceability of components.

Materials

Parts in contact with the product    AISI 316L
Other st.st. parts                              AISI 304L
Gasket                              EPDM according to FDA 177.2600
Internal surface finish                       Ra ≤ 0,5 µm
External surface finish                       bright polish

Options

Steam barrier (if shaft sterilisation is required).
Jacketed body.
Spring up to 10 bar.
Range of springs offers various operating pressure ranges.
Gaskets: NBR or FPM.
Connections: weld.
Material and surface finish certificates.

Technical specifications

Available sizes                         DN 1" - DN 3"
Operating temperature        -10 ºC to +121 ºC (EPDM)     14 ºF to 250 ºF
                                               +140 ºC (SIP, max. 30 min)   284 ºF
Max.operating pressure       10 bar                                    145 PSI
Compressed air pressure      6-8 bar                                   87-116 PSI
Air supply connections          G1/8" (BSP)

 CERTIFICATE              

Data sheet	ESENFRITDERUPL
Instructions manual	ESENFRITDERUPL