Pinch Valves for Drinking Water and Wastewater

Sludge is one of the toughest materials to manage. It is viscous, full of solids, and chemically aggressive. When municipal and industrial waste streams mix, the complexity increases.

Pinch valves offer clear advantages:

• They resist chemical attack,
• They contain odours,
• They eliminate obstructions or cavities where solids can accumulate,
• They pass maximum flow without restriction,
• They withstand grit and hemp fibers abrasion.

A pinch valve is the only valve design that meets all these requirements.

Lime is widely used to stabilize pH in potable and wastewater treatment. It is stored as a powder and mixed into slurry before injection. Lime slurry is abrasive and can be corrosive depending on the chemicals used.

Pinch valves are ideal for lime handling because:

• The flexible sleeve prevents scale buildup.
• The changing sleeve shape breaks up lime deposits as the valve operates.
• There are no dead zones where lime can accumulate.The rubber sleeve maintains a tight seal even around hardened lime particles.

Grit includes sand, gravel, stones, and road debris entering the plant. It is extremely abrasive. Conventional valves suffer damage as grit infiltrates seals, seats, and packing. This creates leaks and costly failures.

Pinch valves solve these problems:

• The elastomer sleeve absorbs impacts from grit,
• The sleeve rebounds to maintain sealing integrity,
• No metal components are exposed to abrasion,
• No need for special alloys or expensive metal constructions.

Milton Roy pinch valves offer a reliable, low-maintenance solution for handling abrasive, corrosive, and solids-laden wastewater with maximum process safety.

• Perfect for abrasive, corrosive, and fibrous media
• No clogging, no dead zones, no contamination
• Long service life and low maintenance
• Reliable sealing under harsh conditions
• Simple, robust, and cost-effective.

Pinch valves are widely used to ensure reliable flow control in applications such as:

• Raw sewage transfer
• Sludge handling
• Lime dosing
• Grit removal
• Chemical injection
• Effluent discharge

Their simple design delivers reliable performance across the entire water and wastewater treatment cycles.