DN 38 Hose Couplings for ViscoPower Drum Pumps | High-Viscosity Transfer Solutions

Flux DN 38 hose couplings are engineered specifically for high-viscosity liquid transfer using our Viscopower series drum pumps. Use these stainless steel couplings to connect various types of flexible hoses to the pump discharge port, ensuring that the viscous pumped media can be transferred with complete process integrity. These DN 38 couplings comprise a 2” tri-clamp hose tail, FKM seal and cardan clamp, providing a secure, safe, low-pressure hose connection. Alternative hose tail sizes and seal materials are available on request. You can quickly disassemble the cardan clamp and remove the hose for decontamination if needed. One or two bolted stainless steel hose clamps (available separately) are used to secure the hose to the hose tail. These are low-pressure connections, designed for use with short, open-ended hoses, < 5 m in length. In addition, they should be used with free-flowing liquids of maximum viscosity approx. 5,000 mPas. If used with very high viscosity, adhesive media, there is a risk of the hose becoming detached due to high back-pressure, resulting in a leak. High-pressure, swaged type hose connections are available for such media – consult Flux for further information and pricing.

Connection type: DN 38 hose tail for Flux ViscoPower F 570 and F 580 models

Connection method: 2” tri-clamp, FKM seal and cardan clamp

Materials: Stainless steel 316, FKM (alternative seal materials available on request)

A hose coupling is the mechanical connection that connects a flexible hose to a pump, tank, nozzle, or other process equipment. It must maintain a secure, pressure-resistant seal while withstanding any external mechanical forces. In drum pump applications, hose couplings must prevent leaks and be chemically resistant to the pumped liquids. Hose connections are available in various sizes and types to suit a range of industrial and sanitary applications.

DN 38 stainless steel hose couplings from Flux feature precision-machined, ridged hose tails, designed to provide high grip without damaging the hose. Push the hose tail inside the hose and secure it with an external hose clamp. Then, secure the vibration-resistant tri-clamp connection to the pump outlet, using the circular FKM seal and the articulated stainless steel cardan clamp with wing nut.

Firstly, keep in mind that pumping high viscosity media will create much higher pressure losses than handling low-viscosity fluids. In addition, the smaller the discharge pipe bore, or hose bore size, the higher the pressure losses will be. Therefore, Flux recommends using DN32 or DN38 discharge hose for Viscopower applications.

Flux provides two types of hose connections for Viscopower. Selection is dependent on the expected system pressure, which is in turn dictated by the viscosity and rheology of the pumped media.

For systems with discharge pressure <4 Bar eg. when pumping lower viscosity, free-flowing fluids (<5,000 mPas) over short distances, standard DN32 or DN38 hose couplings with a hose tail and hose clamp are a cost-effective choice. For systems with higher discharge pressures up to 15 Bar, eg. when transferring higher viscosity, adhesive, non-free flowing media, or pumping long distances, Flux recommends swaged, bolted, high-pressure hose connections.

Swaged hose connections are always recommended for ATEX applications and use in Zoned Ex areas, to guarantee a conductive, secure connection between the pump and the hose.

Finally, always ensure that the discharge hose selected has a high enough pressure rating for the application. In general, pumping highly viscous, adhesive media will require higher pressure hose, typically rated to an operating pressure of 16 Bar. If you are unsure, use an online pressure loss calculator to work out system pressure losses, or consult Flux for advice.