NLF TANK BOTTOM SEAT VALVE

Application

The NLF valve is a pneumatically actuated single seat valve designed for assembly at the bottom of the tanks in the dairy, food-processing industries, beverage production, pharmaceutical and fine chemicals industries.

Operating principle 

The seat valves are actuated by a single- or double-acting actuator.
The shaft is actuated by the supplied compressed air and opens or closes the valve.
Possible configuration of the vlave: the valve seat opens into the valve to avoid accidental
openings in case of overpressure in the line and to avoid possible contact with the product recovery scrapers. 

Design and features

Sanitary design according to the 3A specifications.
Total drainage prevents the stagnation of the product.
Normally closed valve (closed by spring) – standard version.
Normally open valve (opened by spring) by a simple turn of the pneumatic actuator.
The valve seat opens into the tank to avoid accidental openings in case of excessive pressure in the tank.
360º adjustable body, even after welding the flange to the tank.
Open lantern for visual inspection of the shaft sealing.
Easy disassembly by loosening the clamp.
Connections: weld (mm or inches).

Materials

Parts in contact with the product       AISI 316L
Other stainless steel parts                   AISI 304
Gaskets (standard)                                EPDM according to FDA 177.2600
Internal surface finish                           Ra ≤ 0,8 µm
External surface finish                          Bright polish

Options

Manual actuation.
Steam barrier (if shaft sterilisation is required).
C-TOP control unit.
Jacketed body.
Larger actuator sizes.
Internal surface finish: Ra ≤ 0,5 µm.
Gaskets: NBR or FPM.
Connections: DIN, Clamp, SMS, RJT, FIL-IDF, etc.
Double-acting actuator.
"Twin-Stop" actuator.
External position sensors.

Technical specifications

Available sizes                       DN 25 - DN 100 DN                     1" - DN 4"
Working temperature          -10 ºC to +120 ºC (EPDM)           14 ºF to 248 ºF 
                                              +140 ºC (SIP, max. 30 min)         284 ºF
Max. working 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