Reliable flow inspection and contamination control for critical pipelines. Valvenok supplies precision-engineered sight glasses and strainers built for high-pressure, high-temperature service.
Request Product SpecsBorosilicate & Tempered Glass
High-speed 24h Dispatch
SS304 / SS316 Construction
ANSI & DIN Flange Standards
Borosilicate & Tempered Glass
High-speed 24h Dispatch
SS304 / SS316 Construction
ANSI & DIN Flange Standards
Valvenok supplies a complete range of inline sight glasses and filtration equipment for fluid and gas pipelines. Whether you need to verify flow direction, monitor liquid colour, or protect downstream equipment from particulate contamination, our products deliver dependable performance.
Our portfolio includes flanged sight glasses with rotor or flapper indicators, Y-type and basket strainers in carbon and stainless steel, and duplex filter assemblies for continuous-service applications.
Product Categories
Flanged & Threaded Sight Glasses
Flapper, Rotor & Drip Tube Indicators
Y-Type Strainers (Cast & Forged)
Basket Strainers for High Flow Lines
Duplex Filter Assemblies
Replacement Screens & Mesh Elements
BAG-FL double glass flanged sight glasses for visual flow monitoring. Available in DN15 to DN150 with borosilicate glass viewing windows, rated PN16 and PN40. Suitable for water, food, chemicals, air and other gases. Cast iron GG25 body with PTFE sealing, to EN 558 / EN 1092-1/2.
Browse Products
Complete Steed Machinery hydraulic filtration range for demanding industrial applications. High pressure filters rated to 350 bar, aluminium body filters, return line filters, duplex assemblies, suction strainers and clogging indicators — all available to order with fast UK dispatch.
High Pressure Filters — up to 350 BAR
Aluminium Filters — up to 250 BAR
Return Line Filters
Duplex Filters
Suction Strainers
Clogging Indicators
Oil & Gas Pipelines
Chemical & Petrochemical Plants
Food & Beverage Processing
Water & Wastewater Treatment
Pharmaceutical Production
Steam & Condensate Systems
Need a custom flange rating or specific mesh micron size? Our technical engineers can spec the right sight glass or strainer for your line conditions.
Contact Technical Team