Guangzhou Ao Village Valve Co., Ltd. is a comprehensive enterprise headquartered in Shanghai, specializing in the development, production, sales and after-sales service of various types of valves, and agent sales of various imported valves. The main products of Guangzhou AoCun Valve Co., Ltd. are: ball valve, butterfly valve, globe valve, gate valve, check valve, plunger valve, regulating valve, filter, diaphragm valve, plug valve, needle valve, exhaust valve, mud valve, Traps, breathing valves, flame arresters, balancing valves, pipe clamp valves, discharge valves, pneumatic valves, electric valves, food-specific valve series, high temperature and high pressure valves, cryogenic valves, thermal insulation valves, hydraulic control valve series, vacuum valves, stainless steel Valves, rubber-lined fluorine valves, American standard Japanese standard German standard valve series, bellows valves, ammonia valves, etc. Connection methods are: flange connection, wire connection, clip connection, butt weld connection. (pressure from 1.0MPA-32MPA), (temperature -20 degrees -550 degrees). Materials are: Cast iron, cast steel, stainless steel, forged steel agents Foreign products are Japan: HITACHI (Hitachi), KITZ (Beize), valve days (VENN), Korea JK special valves, UK UK Valve International Co., Ltd. UK ( Youke) valve. Guangzhou Ao Village Valve Co., Ltd. products are widely used in chemical, petrochemical, petroleum, paper, mining, electric power, liquefied petroleum gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment, electronics industry, urban construction and other fields. Products sell well all over the country, high quality, efficient service, won the trust of users and extensive praise. Guangzhou Ao Village Valve Co., Ltd. always takes quality as the basis, all meets the user's business philosophy, constantly applies new technology, new technology and new materials, and sincerely provides users with high quality valve products and more perfect after-sales service. Aocun valve originated from Taiwan, scientific management, mature design, exquisite craftsmanship, sophisticated equipment, meticulous processing, accurate testing, and has been well received by users since its sales. In the valve industry, there is the reputation of “Golden Body Village”! Your needs, our goals!

The gate valve refers to a valve in which the closing member (gate) moves in the vertical direction of the center line of the passage. The gate valve can only be used for full opening and full closing in the pipeline, and cannot be adjusted and throttled. The gate valve is a kind of valve which is widely used. It is generally used for cutting devices with a diameter of DN ≥ 50mm. Sometimes the cutting device with a small diameter also uses a gate valve.
The gate has two sealing faces, and the two sealing faces of the common mode gate valve of Zui form a wedge shape...

Classification of gate valves

1) Parallel gate valve: the sealing surface is parallel to the vertical center line, that is, the gate valves whose two sealing surfaces are parallel to each other. Parallel gate valves usually use a double gate structure. In the parallel gate valve, the structure with thrust wedges is often common, and there are double-sided thrust wedges in the middle of the two gates. This gate valve is suitable for low-pressure medium and small diameter (DN40-300mm) gate valves. There is also a spring between the two shutters, the spring can produce a pre-tightening force, which is conducive to the sealing of the gate...

2)

Advantages and disadvantages of gate valves

Advantages of the gate valve:
(1) The fluid resistance is small because the inner medium passage of the gate valve body is straight-through, and the medium does not change its flow direction when flowing through the gate valve, so the fluid resistance is small.
(2) The opening and closing torque is small, and the opening and closing is less laborious because the direction of the ram movement when the gate valve is opened and closed......

Gate valve diameter shrinkage

If the diameter of the passage in a valve body is different (often the diameter of the valve seat is smaller than the diameter of the flange joint), it is called the diameter contraction.
The shrinkage of the diameter can reduce the size of the parts, reduce the force required for opening and closing, and expand the application range of the parts. But after the path is contracted. Increased fluid resistance loss...

Standard summary of gate valves

DL/T531-1994 (2005 review) Technical conditions for high temperature and high pressure stop valves and gate valves of power stations
GB/T12234-1989 General valve flange and butt weld connection steel gate valve General purpose industrial valves—Flanged and butt-weld steel gate valves
JB/T5298-1991 Steel slab gate valve for pipeline...

Use, structure description and characteristics of slab gate valve

The slab gate valve is suitable for use in natural gas, petroleum, chemical, environmental protection, urban pipelines, gas pipelines and other transportation pipelines, venting systems and steam storage devices, and is used as an opening and closing device. The Z43 type single-plate slab gate valve with diversion holes is suitable for long-distance pipelines for natural gas extraction and purification.
Slab gate valve diameter range: DN25 ~ 1200 Pressure range: 0.6MPa ~ 45MPa 150Lb ~ 3000Lb
A slab gate valve with a diversion hole is used for a pipeline that requires a ball clearing pipe, and a slab gate valve without a diversion hole...

Structural features of compensating double gate slab gate valve

The compensation type double gate slab gate valve is a novel slab gate valve product with the characteristics of small opening and closing torque, high speed, small vibration, long service life, safe and reliable operation, etc. It is mainly used for cutting of gas and liquid conveying pipelines. Or vent.
The double slab sluice gate valve series features:
1. The valve adopts a sealing structure composed of two parallel rams and a wedge device.

Analysis of flow characteristics of slab gate valve

A slab gate valve with a diversion hole has the same flow characteristics as a pipe of the same specification, and has an equal percentage characteristic. A slab gate valve without a diversion hole, wherein the cavity span is smaller than a wedge gate valve and belongs to a regular cylinder, so The other characteristics are basically similar except that the pressure loss is larger than that of the flow guiding hole. The slab gate valve without the diversion orifice adjustment has better flow regulation characteristics than the slab gate valve without the diversion orifice.
Valve opening degree - Cv characteristic curve table...

Gate valve application conditions and operation

1. Gate valves are commonly used in open-close applications and cannot be used for throttling applications.
2. The gate valve is usually mounted on a horizontal pipe with the valve stem vertically up. It can also be installed on a vertical pipe or a horizontal pipe whose valve stem is not vertically upward, but depending on the size of the valve, the application environment and the material, a special structure may be required. If the valve purchased is to be specially installed, the orientation of the valve should be stated when ordering...