Danfoss HFI 040-070 Installation Guide
Summary
This comprehensive guide details the setup and maintenance of High Pressure Float Valves. It provides expert instructions for safe installation procedures, including critical steps for welding protection, nitrogen purging, and replacing full float assemblies. Essential warnings are provided regarding system safety to prevent damaging incidents like liquid hammering. This manual is designed for HVAC specialists, mechanical engineers, and refrigeration technicians who require precise, reliable guidance for servicing industrial cooling systems using HFI valves.
Page 1 Text Content
Instructions High Pressure Float Valve Régulateur modulant de niveau haute pression HFI Installation
Fig. 1 Fig. 2
24 mm 183 Nm (135 LB-feet)
Fig. 3
Maintenance
24 mm 183 Nm (135 LB-feet)
Fig. 4 Fig. 5
Detail / Détail A Detail / Détail B Fully closed Fully open Complètement fermé Complètement ouvert
No orifice holes Orifice holes exposed exposed
Fig. 6 © Danfoss A/S (AC-MCI / MWA), 2012-09 DKRCI.PI.GB0.A6.77 / 520H0444 1
Page Summary Contents For Danfoss HFI 040-070 Installation Guide
Manual Details
| Brand | Danfoss |
|---|---|
| Pages | 4 |
| File Size | 565.13 KB |
| Published | June 05, 2026 |
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Frequently Asked Questions
What torque should be used when tightening screws on the valve?
Use a torque wrench to tighten the screws with a torque of 183 Nm (135 LB-feet).
What steps are necessary if welding is required near the float valve?
You must remove the end cover and dismantle/remove the float assembly before any welding operations.
What precautions should be taken regarding fluid dynamics in the system?
The piping system must be designed to prevent liquid traps and reduce the risk of hydraulic pressure surges like "hammer",
Are there material restrictions for using this valve?
It is applicable to all common non-flammable refrigerants, which include R717.