Gate Valves with API Standard

Product Introduction:

Gate valves are a kind of industrial valves used to open and close the flow path.

These valves cannot regulate the flow and thus, they are merely on/off valves.

Different modules used in these valves include:

* Body: optimizing the product and reducing the casting volume and weight of the valve

* Bonnet: connected to the body through STUD and NUT with the same material as the body

* Trim: all the surfaces in direct contact with the fluid

* Stem: an upward moving part which connects the wedge to the seat ring and enables sealing by overcoming the fluid and friction forces

* Back Seat Bushing: When the valve is fully open, stem is in contact with the sealing seat. So, valve packing can be replaced online without leaking or risks.

* Seat Ring: made of the body material and welded to the body by overlay welding

* Wedge: the optimal angle between the wedge and seat ring is determined by calculation and trial-and-run.

* Gasket: to prevent leaking and offer complete sealing at the body-bonnet interface

* Packing: sealing the stem at the stuffing box

Technical Specifications:

Valve Type Gate Valve Rating 2” ~ 56” End Connection Flanged, RF, ASME B16.5 Size 150, 300, 600, 900 & 1500 Material For Construction Body ASTM A216 WCB Bonnet ASTM A105 Trim 13%Cr / Seat Stellite Stem 13%Cr Back seat N/A Seat A105 + Stellite Wedge ASTM A216 WCB+13%Cr Wedge Seat Surface 13%Cr Gasket Graphite+SS316 Bolting/Nuts ASTM A193 B7, A194 2H Packing Graphite Valve Construction Type OS & Y Type Construction Single Piece Wedge Stem Rising Stem Special Requirement Pressure Seal Bonnet Design Standard API 600 Test Pressure Standard API 598 Face To Face Dimension ASME B16.10 Operator Gear Operated Process Condition CWP 255 bar Max Temperature 538 °C

International Standards or Permission:

API598, API609, API609, API609, BS EN 12266-1, BS5155, BS6755, BS2080, BS4504, AWWA C504, ASME B16.34, ASME B16.10, ASME B16.5, ISO5752, ISO 15156, MSS-SP 44, NACE MR0175.