Question 1

What is a Sleeved Plug Valve and how does it work?

Accepted Answer

A sleeved plug valve is a quarter-turn valve in which a tapered or cylindrical plug rotates within a precision-engineered polymer sleeve (typically PTFE or PFA). This 360-degree annular sleeve creates a continuous sealing surface that delivers bubble-tight shut-off and zero leakage. The non-lubricated design eliminates the need for periodic sealant injection.

Question 2

What applications are SHIELD Sleeved Plug Valves suitable for?

Accepted Answer

SHIELD Sleeved Plug Valves are engineered for chemical processing, petrochemical plants, pharmaceutical manufacturing, water and wastewater treatment, pulp and paper, and food and beverage industries. They handle corrosive acids, alkalis, solvents, hydrocarbons, slurries and volatile organic compounds (VOCs) with low fugitive emissions.

Question 3

What materials are used in SHIELD Sleeved Plug Valves?

Accepted Answer

Body: WCB, Stainless Steel, Ductile Iron. Plug: Stainless Steel with PTFE/PFA lining. Sleeve: PTFE, PFA, FEP, RTFE. This combination provides excellent chemical resistance across a wide range of aggressive media.

Question 4

Does the Sleeved Plug Valve comply with emission standards?

Accepted Answer

Yes. SHIELD Sleeved Plug Valves comply with ISO 15848-2 and TA-Luft for fugitive emissions. The live-loaded top seal and advanced stem sealing make them ideal for VOCs, hazardous chemicals and other regulated media.

Question 5

What sizes and pressure ratings are available?

Accepted Answer

Size range: DN15 - DN600 (1/2" - 24"). Pressure rating: PN10 / PN16 / Class 150 / Class 300. Temperature range: -29°C to 200°C. Design standards: API 599, ASME B16.34, EN 12516. Testing: API 598, ISO 5208, EN 12266-1.