КО Check valve
Check valve is designed for automatic overlap and pressurization of the high-pressure manifold tube channel in cementing, maintenance and operation of oil and gas wells.
The valve consists of a housing, a ball, a spring, a sleeve nut, a stop plug, a vessel and a ring.
The valve is mounted into the high-pressure manifold, connected to the flange connection with the octangular steel ring gaskets.
The valve opens under the fluid pressure impact in direct feed through the pipe string - ball moves down, in absence of circulation the valve closes under spring impact, the valve closes in case of reverse fluid feed, the stream is cut off.
|Working pressure, PSI (atm.)||5144 (350)||5144 (350)|
|Length||0,66 ft / 200 mm||0,68 ft / 206 mm|
|OD||9 5/8″/ 245 mm||10 7/16″/ 265 mm|
|Cross-section diameter||2 1/16″/ 52 mm||2 1/16″/ 52 mm|
|Weight, lbs (kg)||54 (24,5)||66 (30)|
|Connection||Spec. buttress thread 100х12.7 (QRC 2")
Flange type 1 65х35 GOST 28919-91
|Spec. buttress thread 100х12.7 (QRC 2")
Flange type 1 80х35 GOST 28919-91
|Материал деталей||сталь 40Х ГОСТ 4543-71|
|Corrosion-resistant design version||K1 as per GOST 13862-90|
|Handling medium||Oil, gas, gas-condensate, flush liquid with СО2 content up to 6%|
|Ambient class||UHL (HL) as per GOST 15150-69|
|Ambient processing temperature, °К(°С)||from 233(-40) to 373(100)|