Cutting Ring Couplings DIN 2353/ISO 8434-1. Danfoss Waltech Hydraulic BITE TYPE Fittings. Danfoss Waltech offer a complete product range at the highest quality: Based on this principle Danfoss Waltech offers one of the most comprehensive product ranges for tube coupling systems. The Danfoss Waltech programme includes cutting ring, soft seal, flared couplings and flange couplings, plus a wide range of accessories. The Danfoss Waltech range of hydraulic compression fittings cover sizes from 6mm OD to 42mm OD in light-duty and from 6mm OD to 38mm OD in heavy-duty. Manufactured to DIN 2353 standard, mild steel with C6F free surface coating, each compression fitting is supplied complete with cutting ring and nut. Pressure Range Guide: Light Duty 6mm OD-18mm OD = 400 bar. 22mm OD-42mm OD = 250 bar. Heavy-duty 6mm OD-16mm OD = 630 bar. 20mm OD-25mm OD = 400 bar. 30mm OD-38mm OD = 250 bar. These pressures are for guide purposes only and please consult our technical department for specific applications.