Oxygen Globle Valve

◆ The shut-off valve plays an important role in cutting off and throttling the medium in the pipeline. As an extremely important shut-off valve, the oxygen shut-off valve is sealed by applying torque to the valve stem, and the valve stem is in the axial direction. Pressure is applied to the valve flap so that the sealing surface of the valve flap and the sealing surface of the valve seat are closely attached to prevent the medium from leaking along the gap between the sealing surfaces. The sealing pair of the oxygen shut-off valve is composed of a valve flap sealing surface and a valve seat sealing surface. The valve stem drives the valve flap to move vertically along the center line of the valve seat. During the opening and closing process of the oxygen stop valve, the opening height is small, the flow is easy to adjust, and the manufacturing and maintenance are convenient, and the pressure application range is wide. From the structural point of view, the oxygen shut-off valve is simpler than the former, easy to manufacture and maintain. In terms of service life, the sealing surface of the oxygen shut-off valve is not easy to wear and scratch. During the opening and closing process of the valve, there is no relative sliding between the valve disc and the sealing surface of the seat. Therefore, the wear and abrasion of the sealing surface are small, so it is improved. The service life of the seal pair is that the valve flap stroke of the oxygen shut-off valve is small during the fully closed process, and its height is smaller than that of the alarm valve. The disadvantage of the oxygen shut-off valve is that the opening and closing torque is large and it is difficult to achieve rapid opening and closing. Because the flow passage in the valve body is relatively tortuous, the fluid flow resistance is large, and the fluid power is lost in the pipeline.

◆ For the nominal pressure PN≥1.6MPa, DN125～200 adopt internal bypass structure; DN250～500 adopt external bypass valve structure. Its purpose is to reduce the pressure difference before and after the valve to avoid high flow rate, high scouring, and to prevent the generation of high temperature, thereby ensuring the safe operation of the oxygen pipe network and reducing the operating torque.

◆ Medium flow direction: PN≥1.6MPa, DN≤100 medium flows from below the valve clack to the top of the valve clack (that is, low inlet and high output), DN≥125 medium flows from the valve clack to the bottom (high inlet and low output). The valve with DN≥125 adopts the flow direction of high medium inlet and low medium outlet. On the one hand, the structure of the internal bypass valve is required, and on the other hand, the closing force of the valve is greatly reduced due to the pressure of the medium.

◆ The valve is equipped with a static electricity safety device to avoid sparks due to static electricity.

◆ Compared with ordinary shut-off valves, the bracket part of the oxygen pipeline shut-off valve adopts a fully enclosed structure, and the protective cover on the bracket can be opened when the packing is compressed, which plays a role of oil and dust prevention. And there are obvious oil prohibition marks.

◆ The main body material is stainless steel or copper alloy with excellent flame retardancy, the sealing surface is the body or surfacing D802, and the remaining internal parts are made of stainless steel or copper alloy; the lubrication of the transmission part is made of non-combustible grease.

◆ All parts adopt strict degreasing treatment and performance specifications

◆ Design: API600 / ASME B16.34 / API602 / BS5352

◆ Face to face: API6D / ASME16.10/ ISO5752

◆ Flange end: ASME B16.5 / ASME B16.47 / EN1092-2 / GOST 12815 / MSS-SP44

◆ Socket welded end: ANSI B16.11

◆ Screw end: ANSI B1.20.1

◆ Butt-welding end: ASME B16.25 / ASME B16.25

◆ Test: API6D、API598

◆ Fire safe: API607、API6FA

◆ Size: 1/2”~64”(DN100~DN1600)”

◆ Class: 150Lb~2500Lb(PN10,PN16,PN25,PN40,PN64,PN100,PN160,PN250)

◆ Connection: Double flange

◆ Operation: Worm Gear、Pneumatic actuator

◆ Application: Iron and steel industry, metallurgy, petrochemical, chemical industry

◆ Body: HTB1、Aluminum bronze, ASME 1565 C86500、Brass, Monel, Stainless steel、SS304、SS316 etc.

◆ Ball: HTB1、ASME B564 NO400、Aluminum bronze, ASME 1565 C86500、Brass, Monel, Stainless steel、SS304、SS316 etc.

◆ Stem: ASTM B865 NO5500、C63200、F304、F316、SS321

◆ Seat: PTFE、RPTFE、MONEL、ASME B564 NO400、C63200、F304、F316

◆ JY41W oxygen shut-off valve is a special valve specially suitable for oxygen pipelines. According to the operating characteristics of the oxygen pipeline network and considering the flammable and explosive characteristics of the oxygen medium, the design principles are safe and reliable operation and superior performance, and refer to the Ministry of Metallurgical Industry of China A special shut-off valve designed and manufactured to ensure the safe operation of the oxygen pipeline network based on the provisions of the "Oxygen Safety Regulations". The main body material of JY41W/Y oxygen dedicated through globe valve is made of stainless steel or copper alloy with excellent flame retardancy. The sealing surface is the body or surfacing D802. The remaining internal parts are made of stainless steel or copper alloy; the lubrication of the transmission part adopts non-combustible lubrication Grease, and marked with an obvious oil prohibition mark. The structure of JY41W/Y oxygen dedicated straight-through shut-off valve, the bracket adopts a fully closed seal, and a static electricity removal device, and the valve stem is equipped with a dust cap. The special shut-off valve valve for oxygen pipelines has been trusted by the oxygen pipe network of large and medium-sized steel plants, oxygen plants, and petrochemical plants since it was put on the market! 　Oxygen valves are often used in physical and chemical experiments. Gases such as hydrogen and argon. These gases are generally stored in special high-pressure gas cylinders. When in use, the gas pressure is reduced to the range required by the experiment through the pressure reducing valve, and then finely adjusted by other control valves, so that the gas is input into the use system. The most commonly used pressure reducing valve is the oxygen pressure reducing valve, or oxygen meter for short. Some gases, such as nitrogen, air, argon and other permanent gases, can use an oxygen pressure reducing valve. But there are some gases, such as ammonia and other corrosive gases, which require special pressure reducing valves. Commonly available in the market are special pressure reducing valves for nitrogen, air, hydrogen, ammonia, acetylene, propane, and steam. The usage and precautions of these pressure reducing valves are basically the same as those of oxygen pressure reducing valves. However, it should also be pointed out that special pressure reducing valves are generally not used for other gases. In order to prevent misuse, special connection ports are used between some special pressure reducing valves and steel cylinders. For example, both hydrogen and propane use left-hand thread, also called reverse thread, and special attention should be paid when installing.

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