I. Main Features

The plunger globe valve features a compact and scientific structure, with flexible and effortless opening and closing, requiring less operating force. Its most significant advantage lies in its superior sealing performance, enabling zero-leakage operation. The plunger adopts a multi-layer sealing structure combining metal and non-metal materials, forming a dual sealing effect that greatly enhances sealing reliability.The main stop valve product names of China Stop Valve Network include:UJ41H Flange Straight-through Plunger Globe Valve,Flange Straight-through Ammonia Globe Valve,Flange Straight-through Low Temperature Globe Valve,Forged Steel Straight-through Globe Valve,GB Bellows Globe Valve,High Temperature and Pressure Power Station Electric Globe Valve,Vacuum Isolated Straight-through Globe Valve,Y-type Jacket Insulation Globe Valve.

The integrated tapered valve seat (cylinder sleeve) is designed with a radial tapered sealing surface, offering a large contact area and high sealing height, effectively ensuring long-term sealing stability. The piston ring can be made from materials with high temperature resistance, wear resistance, corrosion resistance, and strong resilience according to different media characteristics, making it suitable for various working conditions such as steam, oil products, and chemical media.

In terms of maintenance, the plunger globe valve allows piston ring replacement without removing the valve body from the pipeline. Simply stop the steam supply, open the bonnet assembly, and complete the replacement. This simple maintenance process enables repeated use and significantly reduces maintenance costs.

II. Structure and Working Principle

The plunger globe valve is mainly composed of the valve body, bonnet, valve stem, plunger, piston ring, and integrated tapered cylinder sleeve (valve seat). The handwheel drives the valve stem to rotate, which in turn drives the plunger to move up and down within the tapered cylinder sleeve, achieving valve opening and closing control.

The tapered inner bore of the cylinder sleeve is surfaced with stainless steel or hard alloy according to the working conditions, with a surfacing layer hardness reaching HRC40, and is finished through precision boring and grinding. When the first piston ring wears out, the second metal tapered sealing structure continues to function, ensuring reliable sealing.

III. Application Advantages

The plunger globe valve has a service life several times longer than that of ordinary valves. It requires almost no special maintenance during use and maintains a leak-free state over the long term. It is an ideal choice for high-temperature and high-pressure pipelines such as steam and thermal oil systems, offering significant advantages in energy saving, consumption reduction, and environmental protection.

Do you still need to know or purchase the following globe valve products:

• Square Flange Ammonia Globe Valve
• UJ41H Flange Straight-through Plunger Globe Valve
• Vacuum Isolated Straight-through Globe Valve
• Y-type Jacket Insulation Globe Valve
• Y-type Butt Welded Globe Valve
• Y-type Rubber-lined,Fluorine-lined Globe Valve