PHARMACEUTICAL OVERFLOW VALVE

Application

The 74700 valve is a sanitary stainless steel overflow valve, its design makes it adequate for protection of installations in the pharmaceutical industry. It is used to perform pressure bypass for safety purposes in order to protect lines, pumps, fittings, tanks, etc.
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

Under normal operating conditions, the valve remains closed. It is calibrated to a specific pressure by regulating the spring with the pressure nut.The calibrated pressure is a maximum safety pressure to avoid damage of the plant.
When the pressure in the circuit exceeds the calibrated pressure, the valve opens letting the flow pass, thus, the pressure in the pipe system is reduced.
The valve can be provided with a handle, its designs allows to partially open the valve in order to allow the passage of the cleaning solutions during the CIP process. 

Design and features

Normally closed valve.
Easy manual adjustment.
Standard connections: Clamp OD.
Easy assembly/disassembly by loosening the clamp.
Traceability of the components.
Leakage detector.

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

Connections: weld.
Gaskets: NBR and FMP.
Several operating ranges (change of spring).
Handle for partial opening of the valve to allow the passage of the cleaning solutions
during the CIP process (bypass application for positive displacement pumps).
Safety seal for identification of factory calibration.
Material and surface roughness certificates.
ATEX version.

Technical specifications

Available sizes                DN 1" - DN 3"
Working temperature   -10 ºC to +121 ºC (EPDM)         14 ºF to 250 ºF
                                       +140 ºC (SIP, max. 30 min)        284 ºF
Max.working pressure  0-3 bar / 0-6 bar / 0-10 bar  
                                       0-43,5 PSI / 0-87 PSI / 0-145 PSI

CERTIFIKATE                 

Datenblatt	ESENFRITDERUPL
Betriebsanleitung	ESENFRITDERUPL