Features of gate valve manufacturers
Floating slab gate
Spring/pressure loaded seat ring with relief valve
Bubble tight shut off at high and low pressure 
Bi-directional operations
Double Block and Bleed performance available 
Seat faces protected from erosion by flow 
Position indicator
Top entry assembly for on-line maintenance

Various actuation (Electric, Pneumatic and Hydraulic actuators)

Applicable standards of API Slab Gate Valves:
a) Design & Manufacture: API 600, API 6D, BS 1414
b) Face to Face: API 6D, ASME B16.10, EN 558
c) Connection End: ASME B16.5, ASME B16.25, EN 1092, EN 12627, JIS B2220
d) Test : API 598, API 6D, EN 12266