John Moncrieff: Your Trusted Partner for Flow Indicator Solutions

John Moncrieff Ltd designs and supplies high-quality flow indicators that deliver critical visual feedback on process conditions, fluid movement, and system integrity. With precision-engineered viewing windows, our indicators provide clear observation of flow, colour, clarity, and contamination—essential for maintaining plant safety and process efficiency.

Key Features

• Versatile Materials: Available in stainless steel, carbon steel, or gunmetal bodies to match your system requirements and process compatibility.
• Temperature & Pressure Resistance: Rated for demanding environments, operating at temperatures up to 250 °C and pressures up to 16 bar (standard range) or 40 bar (high-pressure models).
• Specialised Construction: Options include duplex steel, aluminium bronze, and quartz glass windows for enhanced corrosion and temperature performance in critical service.

Performance & Applications

Our flow indicators are used across diverse industries where reliability and visual process verification are vital to operational safety and control. Typical applications include:

• Chemical and petrochemical process systems
• Pharmaceutical and biotechnology production lines
• Food and beverage manufacturing plants
• Power generation and utility systems
• Marine and offshore installations

Technical Options

• Window Materials: Borosilicate, toughened glass, or high-temperature quartz glass.
• Sealing Systems: Precision-engineered gaskets and O-rings for long-term pressure integrity.
• Flow Patterns: Available in straight-through, sight tube, and rotary-type configurations.

John Moncrieff Ltd is committed to delivering reliable flow indicator solutions that combine engineering precision, durability, and clear visual feedback. Contact our technical team for specification guidance or to discuss a tailored flow monitoring solution for your system.