Introduction
The DWPA Series by Duff Norton Europe is a range of rotary unions designed for general-purpose fluid transfer applications, particularly suitable for moderate temperature water. The series can also handle non-corrosive oils and solutions compatible with nitrile rubber.

Specifications
The DWPA Series includes models DWPA821, DWPA827, DWPA834, DWPA849, and DWPA860, with nominal diameters ranging from Ø 12 to Ø 46. The overall length varies from 128 mm to 228 mm, and the overall diameter ranges from Ø 65 to Ø 132. Shaft and housing connections are available in BSPP or NPT standards, with sizes varying according to the model.

Performance & Warranty
The rotary unions are tested at 14 bars and 1500 rpm, with a one-year warranty covering defects in materials or workmanship.

Product Features
- Silicon carbide/carbon graphite seal faces for durability.
- Internal bearing protection and vented body to prevent lubricant washout.
- Available in dual flow models with elbow fittings.

Working Parameters
- Maximum rotation speed: 1750 rpm (up to 3000 rpm with reduced pressure).
- Suitable fluids: Water, oils, or non-corrosive fluids.
- Maximum pressure: 14 bars (11.2 bars at higher speeds).
- Working temperature: Up to 70°C (11.9 bars pressure up to 100°C).

Materials
- Rotor: Stainless Steel
- Stator: Aluminium
- Mechanical Seal: Silicon Carbide/Carbon Graphite
- Ball-Bearing: Carbon Steel
- Grease fitting and Plug: Stainless Steel

Additional Features
- Short run dry capability for initial machine start-up.
- Easy maintenance with cartridge system.
- High precision ball bearings for smooth operation and longevity.
- Suitable for use in the printing industry.