Non Return Valves

Data sheet

Fields of applications
Rueckschlagventil

LIAG® non-return valves (check valves) reliably prevent products from flowing back into pipes. Non-return valves of the 61A and 62A series are provided with a 4-way controlled metallic disk seal which reliably prevent the so-called flutter effect up to an operating pressure of 20 bars (290 psi). The disk seal of the 62B series is in metal, that of the 62C series in Teflon. LIAG® non-return valves have CIP capability, feature a compact design and can be taken apart in a single step.

Features

Minimum flow resistance – pressure drop
Hydrodynamic inner casing
CIP-capability
Compact design
Taken apart in a single step
Robust and high reliability

Technical Data Overview

Nominal sizes:
DIN DN25 - DN80 / SMS DN25 - DN76

Materials:
All stainless steel parts: O-ring seals:		AISI 316L (1.4404) EPDM, FPM (Viton®)

Surfaces:
In contact with product:		Ra ≤ 0,8 µm (Ra ≤ 32µin)

Temperature:
Operating temperature: Short-term:		110°C (230°F) 140°C (284°F)

Pressure:
Operating pressure:		20 bar max. (290 psi max.)

Opening pressure:
DN25 / 1″ DN40 / 38 / 1,5″ DN50 / 51 / 2″ DN65 / 63 / 2,5″ DN80 / 76 / 3″		0,18bar (2,6psi) 0,12bar (1,7psi) 0,08bar (1,2psi) 0,06bar (0,9psi) 0,05bar (0,7psi)

Valve connection:
Welded ends / Male ends:		DIN11850 / DIN11851
Male ends:		DIN11851, SMS1145

Non Return Valves Data sheet

Non Return Valves

Data sheet