Guichon manufactures valves specially adapted to PPproduction :

Check valve & Sight glasses & Strainers, Multiways valve, Globe valve, Tank bottom valve

Type : 802

DN 12" Class 150 Lbs
– St. steel 304L, filtration 2 mm
– Butt-weld ends
– Stainless steel 304L
4-way piston Valve
DN 3"x3"x3"x3" Class 300 Lbs
– Rotating pistons
– AISI 316 Ti (1.4571) stainless steel

Globe valve
DN 14" Class 600 Lbs
– Manual gear operator
– Heating jacket


  • Construction materials: Carbon Steel (CS), Stainless Steel (SS), Duplex & Super Duplex, Titanium, Zirconium, Uranus® B6, Tantalum, Nickel, Hastelloy®, Monel
  • Construction methods: Fabricated (Welded), Cast, Solid


  • Service conditions: High pressure, High temperature, Low temperature, Abrasion, Corrosion, High viscosity, Vacuum, Reliability, Low acoustic signature, Dead space free
  • Types of fluids: Liquids, Liquids with solid particles, Gas, Powder and powdery media, High viscosity fluids

FAQ - PP - Polypropylene

PP – Polypropylene – Uses of PP (Polypropylene) :

This polymer associated with others allows multiple uses and has the advantage of being easily recyclable. The polypropylene is used in the automotive, polypropylene plastic is most commonly used than the PVC, the polyethylene and the polyurethane. We can find it for example in the wiper motors, bumpers, the locking device trunks, dashboards, empty pockets, carpets … In appliances, tanks and bases of washing machines include polypropylene … In packaging its use remains relatively low, with only 7% of plastics used in this sector includes polypropylene It is also found in toys, luggage, fibers …

Posted in: FAQ - PP - Polypropylene

PP – Polypropylene – Manufacturing process of PP (Polypropylene) :

Polypropylene is currently one of the fastest growing polymers. Much of this growth is attributed to polypropylene’s ability to displace conventional materials (wood, glass, metal) and other thermoplastics at lower
cost. Polypropylene (PP) is a tough, rigid plastic and produced in a variety of molecular weights and crystallinities.

Polypropylene is made from the polymerization of propylene gas in the presence of a catalyst system, usually Ziegler-Natta or metallocene catalyst. Polymerization conditions (temperature, pressure and reactant concentrations) are set by the polymer grade to be produced.

Various production processes exist with some general similarities. They are taking place either in a gas-phase (fluidized bed or stirred reactor) or a liquid-phase process (slurry or solution). An example of flow diagram corresponding to each of the two types of processes is illustrated in figure 1 bellow. The gas-phase polymerization is economical and flexible and can accommodate a large variety of catalysts. It is the most common technology in modern polypropylene production plants. Relevant technologies are Novolen®, Unipol® (gas-phase processes), Borstar® and Spheripol® (liquid-phase processes).

Figure 1a : PP gas-phase process example

Figure 1b: PP liquid-phase process example.

The obtained powder is finally conveyed to powder silos and then converted into pellets that incorporate a full range of
well-dispersed additives.

Posted in: FAQ - PP - Polypropylene

PP – Polypropylene – Recommended valves :

Guichon Valves offers valves specially designed for viscous liquids and designed to minimize pressure drops and dead zones. Jacketed valves allow to maintain the fluid temperature to prevent solidification. Sealants (gaskets, seals, etc …) are selected to prevent pollution of the circulating fluid.

Posted in: FAQ - PP - Polypropylene