News - Flat gate

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Company Name:
Xiamen Freede Industry Co., Ltd.
Contact Person: Carlos Hu
Tel: 86-592-5237455
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Fax: 86-592-3761979
Email: freede@sino-freede.com
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http://www.freedevalve.com

Home > News > Flat gate

Flat gate - 2013-12-23 10:52:13

Applies to natural gas, petroleum, chemical, environmental protection, urban pipelines, gas pipelines and other transportation pipeline, steam venting systems and storage devices used for hoisting equipment. Z43 model with diversion hole single gate type plate valve for natural gas extraction and purification of long-distance pipelines.

Diameter range: DN25 ~ 1200

Pressure range: 0.6MPa ~ 45MPa 150Lb ~ 3000Lb

Diversion hole plate valve needs through ball for pipeline pigging, no diversion hole plate valve does not need to pass the ball on the pipeline pigging.

Applicable occasions

1, Oil and gas pipelines. Flat gate valve with diversion hole is also easy to clean pipelines.

2, Refined oil pipelines and storage facilities.

3, Mining wellhead oil, natural gas, that is, Christmas tree valves.

4, The pipeline medium with suspended particles.

5, City gas pipelines.

6, Water works.

Flat gate structure described

1, To cast a flat structure, there are two forms of the body, usually nominal pressure ≤ 2.5MPa, or ≤ 300Lb time,> 2.5MPa or> choice when casting round structure 300Lb.

2, The seat is PTFE or filled PTFE ring inlaid rigid floating seat with double sealing effect by the end portion of the valve seat ring ○ plus I screwed tight power by floating seat piston reaches the import and export the same time sealing effect this double sealing structure and the valve body cavity is completely isolated from the channel can repair the valve in the working state, the body cavity to exclude residues.

3, The gate is a rectangle parallel to the flat, open a channel on the same diameter through-hole (with diversion hole), or not opening (without diversion hole), the full-Kai, the channel is smooth and straight pipe, low flow resistance coefficient, pressure loss, when the gate opened and closed with the valve seat is always in contact with each other, you can wipe attached to the sealing between the particles of dirt, they can not be directly sealing surface erosion medium to be protected.

Flat gate features:

1 Seat seal structure there should be flexibility preload, the upstream and downstream sealing seat while sealing structure. The seal between the valve seat and the sealing face is always .

2 Seat has self-cleaning function, and open or close the process from direct airflow scour valve . Seat should have made lubrication , do not wear material.

3 Valve actuator failure will not affect the other parts of the valve, repair and replacement work can be performed without removing the valve.

( 1 ) yoke sleeve - aluminum bronze yoke sleeve configuration needle thrust bearing , minimize operating torque.

( 2 ) Stem - thread length until bracket ; pins and welding ; has stability.

( 3 ) pressure seal - a simple structure , configuration, staging buckles and silver plated low carbon steel washers, helps to achieve the best removal and bonnet seal .

( 4 ) Seat ring - welded seat ring perpendicular to the flow channel , and easy to maintain .

( 5 ) Executive agencies - these valves can be configured electric, hydraulic or pneumatic actuator. DN300 following configuration standard manual handwheel , DN350 above configuration helical gear operator .

( 6 ) Yoke - fully assembled yoke through seismic testing, ease of maintenance and installation actuators.

( 7 ) gland - two-piece , self-adjusting gland , to avoid being ejected.

( 8 ) the whole back seat - hard surface , the longest service life .

( 9 ) valve - the valve spring load can adjust itself to reduce the torque requirements of the actuator.

( 10 ) Overall stopper - stopper bracket integrally cast , positioning the valve assembly bracket such that the seat is more stable and reliable.

There are two kinds of casting and welded body structure .

Seat with O- ring seal and a floating seat structure preload force , the valve seal bidirectional import and export ; opening and closing moments of the structure and common valves only 1 / 2 , can reach easily open and close the valve.

Metal-to- metal seal valves , valve grease injector external features , grease through grease , a seat into the valve sealing surface of the valve to achieve zero leakage.

Seat sealed surface mounted PTFE, PTFE has a double seal of metals and metal -to-metal , PTFE sealing surface dirt and clears the ram effect .

Gate , seat through a special process , spray carbide , wear PTFE, achieve double seal . Note secondary seal and grease dual protection , sealing more reliable and last longer.

Gate valve with diversion hole , either fully open or fully closed always coincide with the sealing surface of the sealing surface to be protected from scouring the media directly , thus prolonging life.

When the valve is fully opened, the channel is smooth and linear , flow resistance coefficient is extremely small , no pressure loss , can pass the ball clean wool pipeline .

The valve with self sealing capability packing structure, without frequent adjustment, opening and closing is extremely lightweight, and reliable sealing, stuffing box office with a seal oil into the structure, absolutely reliable sealing performance , truly achieve zero leakage ; solve common valve packing leak easiest ills .

Remove the valve closes automatically when the cavity pressure (see diagram ) , to ensure safe use.

Fully enclosed structure, good protective properties, can be adapted to all-weather requirements.

An indication rod valve or viewing window to indicate that the valve opening and closing the case .

Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve

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