Danfoss ICC 32 Non-Return Valve Installation Guide
- June 1, 2024
- Danfoss
Table of Contents
Danfoss ICC 32 Non-Return Valve
Refrigerants
- Applicable to HCFC, HFC, R717(Ammonia) and R744 (CO,).
- Flammable hydrocarbons are not recommended.
- The valve is only recommended for use in closed circuits. For further information please contact Danfoss.
Temperature range
- -60/+120 °C (-76/+248 °F)
Pressure range
- The valves are designed for a max. working pressure of 52 bar (754 psig).
Technical data
The ICC can be used in Economizer Lines in combination with ICD and ICS. The
ICC prevents the back pressure flow of the medium in the system.
Regulating range
- Dependent on the chosen size.
- Opening differential pressure (p)
- The ICC main valve requires a minimum opening differential pressure of 0.04 bar (0,6 psi) to begin to open and 0.1 bar (1.45 psi) to be completely open.
Design (fig. 4)
- Body
- Top assembly
- 2aO-ring
- 2b O-ring
- Gasket
- Bolts
Installation
The valve must be installed with the arrow in the direction of the flow and the top cover upwards (fig. 1 and 6). The top cover can be rotated 4 X 90° about the valve body. The valve is designed to withstand high internal pressure. However, the piping system should be designed to avoid liquid traps and reduce the risk of hydraulic pressure caused by thermal expansion. It must be ensured that the valve is protected from pressure transients like “liquid hammer” in the system.
Welding (fig. 3 and 5)
The top assembly (fig. 5, pos. 2 and 3) must be removed before welding to
prevent damage to the o-rings and teflon (PTFE) in the function module and to
avoid getting welding debris in the module.
Note
Remove all parts from the valve body before welding (as shown in fig. 3). To
maintain the effectiveness of the anti-corrosion treatment, it is important to
ensure that the valve is disassembled just before the welding / brazing
process is undertaken. If the function modules are to be left disassembled for
any length of time, please ensure that the function modules are further
protected by placing them in a polyethylene bag or by applying a rust
protection agent (e.g. refrigeration oil or BRANOROL) on the surfaces.
Only materials and welding methods, compatible with the valve body material, must be welded to the valve body. The valve should be cleaned internally to remove welding debris on completion of welding and before the valve is reassembled. Avoid welding debris and dirt in the valve body and the function module. The valve body must be free from stresses (external loads) after installation. The valves must not be mounted in systems where the outlet side of the valve is open to the atmosphere. The outlet side of the valve must always be connected to the system or properly capped off, for example with a welded-on end plate.
Assembly
Remove welding debris and any dirt from pipes and valve bodies before assembly. Check that the o-rings are intact before replacing the function module. If possible, apply some refrigeration oil to ease the insertion and to protect the o-rings. Check that the top gasket has not been damaged. If the surface has been damaged or the gasket has been bent, it must be replaced.
Tightening (fig. 7)
Tighten the top cover with a torque wrench, to the values indicated in the
table.
Colours and identification
The ICC valves are Zinc-Chromated from the factory. The Zinc-Chromatization
does not cover the welding connections. The valves must be painted. Precise
identification of the valve is made via the ID plate on the top cover. The
external surface of the valve housing must be protected against corrosion with
a suitable top coating after installation involving welding and consequent
assembly. Protection of the ID plate when painting the valve is recommended.
Maintenance
Service
- The ICC valves are easy to dismantle.
- Do not open the valve while the valve is still under pressure.
- The top assembly module can be lifted out using two screwdrivers as shown in Fig. 2.
Upon opening and removal of the function module
- Check that the o-rings on the function module have not been damaged. A valve with a damaged o-ring might not modulate according to the specification.
- Check that the piston and cylinder are free of scratches and look for wear marks. If the wear is excessive the function module should be replaced to prevent unexpected function issues.
- Check that the movement of the cylinder and valve seat is free and with low friction.
- If the teflon valve plate is damaged it must be replaced. A pre-assembled teflon valve plate in cylinder housing is available as a repair kit (see also fig. 4):
- Remove any dirt from the body before the valve is assembled. Check that the channel in the valve is not blocked by particles or similar. If possible, apply some refrigeration oil to ease the insertion and to protect the o-rings.
Tightening (fig. 7)
Tighten the top cover with a torque wrench, to the values indicated in the
table.
LISTED
Use only original Danfoss parts, including O-rings and gaskets for
replacement. Materials of new parts are certified for the relevant
refrigerant. In cases of doubt, please contact Danfoss. Drawings are only for
illustration, not for dimensioning or construction. Danfoss accepts no
responsibility for errors and omissions. Danfoss Industrial Refrigeration
reserves the right to make changes to products and specifications without
prior notice.
The following text applies to the UL-listed products ICC 32 and 50 Applicable to all common non-flammable refrigerants, including R717 and non-corrosive gases/liquids dependent on sealing material compatibility. The design pressure shall not be less than the value outlined in Sec. 9.2 of ANSI/ASHRAE 15 for the refrigerant used in the system.
Any information, including, but not limited to information on the selection of product, its application or use, product design, weight, dimensions, capacity or any other technical data in product manuals, catalogues descriptions, advertisements, etc. and whether made available in writing, orally, electronically, online or via download, shall be considered informative and is only binding if and to the extents receives teenage it ate is prodtacisionotice. This ion applies to product order resu no it ered sible errors such alerts ons chutes made with another question form, it or All trademarks in this material are property of Danfoss A/S or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.
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