Applications - the fluids in question

Gasses can sometimes be difficult to contain (volatile), they can be dangerous (inflammable) or they can even change state depending on pressure or temperature. This is why optimal seal performance is highly prized.
Gasses such as carbon dioxide, helium, oxygen, ozone or nitrogen, for example, are used for such diverse applications as magnetic resonance, leak detection, welding, paper bleaching, neutralization, effluent treatment or thermal regulation.

Possible solutions

Materials and seat design

The new generation of carbon-filled seats give minimal porosity and increased mechanical resistance over time (increased number of cycles). They also provide excellent pressure-resistance properties.
The progressive range profile offers an improved seal; reduced friction coefficients provide optimum actuation and reduce wear.

Packing gland design

The packing gland uses V-rings, giving an improved external seal.The Belleville washers and the tab washer use automatic compensation to reduce packing gland maintenance.

Decompressing the chamber

A vent hole in the ball (upstream) removes any risk of an excess pressure build-up in the body.

Identification- references

PS4, PY4, PG4 Series

Applications - the fluids in question

Cleaning, deep-freezing and cooling involve cryogenic technology based on nitrogen, oxygen or other gasses.
Therefore, valves that can perform at very low temperatures (-196° C / -320° F) are a must.

Possible solutions

Materials and seat design

A special type of PTFE is used that ensures excellent mechanical resistance and stable torque at low temperatures. Furthermore, it allows proportionate motorization in relation to the valve size.

Cryogenic stem extension

The satisfactory internal volume required to create an efficient gas buffer prevents the packing gland from gaining in mass and so prevents it from blocking the valve.
It is manufactured as a one-piece item with stem for increased mechanical resistance.
The ball has an optimal drive surface and prevents the stem from scraping in the ball.

Decompressing the chamber

Vent hole in the ball remove the risk of an excess pressure build-up in the body.

Identifying the direction of flow

An arrow on the body prevents any possible assembly errors.

Identification- references

PY4 Series
CRYOGENICS Technical Data Sheet 2182 Ko

Applications - the fluids in question

Using an inflammable gas such as oxygen requires precautions to be taken when handling, installing and using the valve.
With certain safety measures in place, it is possible nowadays to use a ball valve.
There are many applications that make use of these gasses, including oxidization, lignification, etc...

Possible solutions

Special valve treatment

A special, systematic degreasing and passivation process prevents any risk of explosion or combustion.

Suitable packing

Heat-sealed, impermeable plastic wrapping (packet of dehydrated salt on request) offers protection against external contamination.

Progressive opening

Manually-operated valve

Using a multi-turn, wheel-operated epicyclical reduction gear prevents any risk of overheating or water hammer.

Motorized valve

Fitting a housing with 4-20 mA positioning solutions, solenoid valves and limit switches offers a compact, pipe-free, multi-purpose assembly.

Identification- references

PS4 MA, PS4 AMT Series

Applications - the fluids in question

A certain number of industries that use so-called "pure" gasses insist on a maximum level of cleanliness.
It is conceivable to use ball valves, but these are subjected to a large number of demands all of which restrict the cavities.
The microelectronics industry is one of the main interested parties in this area.

Possible solutions

Orbital welding ends

50mm long ends make high-quality, automatic welding possible.

Internal parts machining

Balls and ends are machined or polished to attain low levels of surface roughness (Ra <0.8 and other measurements on request) so as to reduce the possibility of impurities snagging on the surface.

Assembly in a clean room

This can be carried out under laminary flow conditions (Class 100…) safeguarding the assembly (On request).

Helium Test

Carried out individually at 10-6 mb/l/s to ensure maximum seal properties.

Valves that do not disassemble

The bolts can be optionally sealed with lead, for increased safety when handling.
Real full bore design internal diameter of the ball matches precisely with pipe internal diameter avoiding dead leg retention.

Suitable packing

A heat-sealed double plastic wrapping (including one kept in nitrogen) safeguards the valves during transport and storage.

Identification- references

PS4 ORB Series

Applications - the fluids in question

Supplying different types of gas to production sites, transporting them by road or by sea, or storing them offshore require flexibility in use, automation and connection.

Possible solutions

Choice of materials

Available in 316L stainless steel or carbon steel.

Adjustable connections

The possibility of mixing connection ends (socket/threaded/flanged) and the manufacture of ends according to customer specifications gives greater flexibility when connecting to tanks, vessels and containers.

Multi-Way

A single 3-way valve provides multi-directional flow while saving both space and money.

Drive options

Pneumatically by:

• Neutral gasses
• Oxygen (on request)

Using gasses available as a power source is now possible.

Electrically (24V AC/DC, 220V…)

Identification- references

PS4 3V, P2S Series
3 WAY BALL VALVE Technical Data Sheet 513 Ko