Plastic manifolds are rotomolded components used in fluid distribution systems. They distribute fluids such as air, water or industrial gases from a single input to multiple outputs, or vice versa. Rotational molding is used to produce these plastic parts because it supports design flexibility and uses tooling that costs less than injection molds.

This article from Gregstrom, a plastic manifold manufacturer, provides an overview of these fluid distribution components and their applications. Importantly, it describes applications for plastic manifolds and the advantages of using rotational molding to make them. Keep reading to learn more, and contact Gregstrom to request a quote or for more information.

What are Plastic Manifolds?

Plastic manifolds enable the controlled flow of fluids. They consist of a central chamber with multiple ports or branches, each of which connects to pipes or tubing. Their internal geometry can be complex, and they require seamless channels to ensure consistent flow rates and minimum pressure drops. Materials of construction include polyethylene (PE) and polypropylene (PP).

Plastic Manifold Applications

Plastic manifolds are used in these and other applications.

• Medical equipment such as dialysis machines and diagnostic devices
• Agriculture and irrigation for the distribution of water or fertilizers
• Chemical processing for handling corrosive fluids in controlled environments
• Automotive and transportation for fuel delivery, air conditioning, and emissions control
• Water treatment in filtration units and reverse osmosis systems
• HVAC systems for the distribution of air or coolant

Why Use Rotational Molding for Plastic Manifolds?

Rotational molding, or rotomolding, produces the one-piece, seamless parts that are required for preventing pressure drops and leaks. More specifically, rotomolding eliminates the need for joints or seams that could become failure points. In addition, this plastics manufacturing process produces a uniform wall thickness for structural integrity.

Designers also like rotational molding because of its flexibility. For example, rotomolding supports complex internal geometries for intricate flow paths. It also supports the use of chemical and UV resistant thermoplastics that weigh less than metals. Plus, mounting brackets and threaded inserts can be molded-in, reducing the need for post-processing and assembly.

Gregstrom Makes Plastic Manifolds       

Gregstrom makes plastic manifolds and is a Made in USA rotational molder with over 75 years of plastics manufacturing experience. In addition to rotational molding, we offer value-added services like tooling, design assistance, quality assurance, assembly, and testing.

Contact Gregstrom to request a quote or for more information.