Frequently Asked Questions

Press fitting system means the permanent joining of pipes and fittings through a mechanical pressing operation. A press fitting system comprises the pipes, the fittings, the o-ring seals and, in the assembly phase, the pressing tools used to produce the joints.

No, this is a permanent installation.

Unpressed fittings are identified by pressurising the system with a pressure range of 100 kPa(1 Bar) to 500 kPa(5 Bar) for water.

Rhinox produces the following press fitting systems: Stainless Steel V-Press and Patent Technology VV-Press.

Compared to traditional systems of joints, the pressfitting systems are rapier much faster to install with particular savings in assembly time. Very simple and practical, requiring only that the correct techniques installation while ensuring a high assurance seals. The pressfitting system also ensures high resistance to corrosion making it particularly suitable for water distribution for drinking water, because of the bacteriostatic action.

Yes, the fitting can be used in wet conditions and after pressing will provide a watertight joint.

The definition “closed circuit” refers to a system characterised by the total absence of air. All the systems that do not belong to this type must be considered as “open circuits”.

No, the O-ring is prelubricated. Additional lubricants could impact on the life of the O-ring and void the warranty. If the O-ring appears dry a small amount of water can be used to lubricate it.

Rhinox Press Stainless Steel may be used in the following applications:

  • Hot and cold potable water
  • Fire service
  • Pump circulated hot water systems
  • Chilled water
  • Steam
  • Industrial and process water
  • Vacuum lines for non-medical purposes
  • Compressed air (oil free)

The quality of used materials, constant sealing and duration tests and the adoption of a rigorous quality control allowed Rhinox pressfitting system to obtain the conformity with the strictest American certifications.

Rhinox Press Stainless Steel fittings can be used with all stainless steel tubes that comply with DEUTSCHE standard (DIN). We make press fittings as standard DVGW W534. And make pipes as standard EN1020.

Stainless steel, copper and copper alloys can be combined without the risk of corrosion. Please note carbon steel should not be directly connected to stainless steel as this will cause corrosion. A spacer connector of brass material should be used to separate the two dissimilar materials by at least 50mm. Flow of water should be in the direction from carbon steel to stainless steel and not vice versa.

The O-ring is manufactured from a high quality black elastomer EPDM with a hardness of 70 Shore. This high-quality polymer is particularly suitable for use in drinking water supply systems up to a maximum operating temperature of 120 ° C.

All Rhinox Press Stainless Steel fittings have a ‘unique pressing indicator’ that enables identification of un-pressed connections. The EPDM seal has a specially designed section in two positions to allow leakage if the joint has not been pressed. The joint will leak at a pressure between 100 to 600 kPa.

To comply with quality standards the Rhinox stainless steel V- press fit piping system is rated to PN16 (16 Bar/232 PSI)) and on VV-press approved applications can be rated up PN40 (40 Bar/580 PSI). Please contact our technical department to discuss this further.

Fittings should be stored in a cool dry place in their original packaging. This protects the fittings from contamination, damage and dirt and conserves the lubrication on the O-rings prior to installation.

No, if a fitting that has been pressed is leaking, the fitting must be cut out and replaced. You should not attempt to weld the fitting as you will melt the O-ring destroying the sealing element.

Within a stainless steel pipework system a passive layer, mostly formed from chromic oxide is created upon contact with oxygen or oxygenated water (i.e. drinking water). This layer restricts corrosion from occurring and provides high levels of hygiene, durability and water quality.

External corrosion of stainless steel pipework is likely to occur when exposed to high levels of chloride. Rhinox Press Stainless Steel fittings should not be installed in this situation. However, if there are parts of the system where this is unavoidable, appropriate precautions must be taken to minimize the risk.

Compared with systems for drinking water, there are no additional requirements to be respected. However, in extreme cases such as the presence of large concentrations of chlorine, salt, marine environments, High TDS or high temperatures, normal stainless steel decay phenomena may occur. This consideration is valid in general terms and is not linked to the type of pressfitting proposed.

The red status indication LED will be permanently on when the Ridgid and novopress has completed 20,000 cycles and is due for service. There are white LED's on the Ridgid and novopress that flash after every cycle once 40,000 press cycles have been complete, indicating a service is due.

No, Rhinox Press Stainless Steel is not suitable for medical gas applications.

No, RhinoxPress Stainless Steel fittings can be pressed only once.

Yes, Rhinox Press fitting system are very efficient in exposed Sunlight, UV and heat.

No, some rotational movement is quite acceptable, the joint will not leak nor will it come apart under the pressure loading and during system operation. Some joint movement is good as it will allow for expansion and contraction in the pipe-work system.

The design and installation of the system must respect local regulations, the guidelines developed by industry-best-practice and the requirements stated in this Guide. In USA and Europe different regulations adopted are recognized as valid and sufficient also in other countries. In any case it is the task of the designer and/or the installer to ensure that the indications contained in this Guide are compatible with local legislation.

Yes, we can make OEM according to your requirement, with no mark or with specified authorized mark.