Exploring the Design Features of Plunger Valves

Structural features of plunger valve I. threaded connection or socket welding connection

1、流道：直通式

1. Flow passage: straight through

2、阀体、阀盖为铸钢或铸钢件，柱塞、阀杆、隔离环为不锈钢。密封圈为柔性石墨或聚四

2. The valve body and bonnet are made of cast steel or cast steel, and the plunger, stem and isolation ring are made of stainless steel. The sealing ring is made of flexible graphite or poly (4)

氟乙烯

Vinylidene fluoride

3、密封环、隔离环由阀体和阀盖连接螺栓、螺母、弹簧垫压紧

3. The sealing ring and isolation ring are pressed by the connecting bolts, nuts and spring pads of the valve body and bonnet

4、靠柱塞外径与密封环内经实现密封

4. The outer diameter of the pillar plug and the inner diameter of the sealing ring are sealed

5、该阀启闭速度较慢

5. The opening and closing speed of the valve is slow

二.对焊接连接直通式柱塞阀

II. Butt welded straight piston valve

1、流道：直通式

1. Flow passage: straight through

2、阀体、阀盖材料为铸钢

2. The valve body and bonnet are made of cast steel

3、其他结构特点同序号

3. Other structural features are the same as the serial number

三.法兰连接直通式柱塞阀

III. flanged straight piston valve

1、流道：直通式

1. Flow passage: straight through

2、阀体、阀盖为铸钢或铸钢件，柱塞、阀杆、隔离环为不锈钢。密封圈为柔性石墨或聚四

2. The valve body and bonnet are made of cast steel or cast steel, and the plunger, stem and isolation ring are made of stainless steel. The sealing ring is made of flexible graphite or poly (4)

氟乙烯

Vinylidene fluoride

3、密封环、隔离环由阀体和阀盖连接螺栓、螺母、弹簧垫压紧

3. The sealing ring and isolation ring are pressed by the connecting bolts, nuts and spring pads of the valve body and bonnet

4、靠柱塞外径与密封环内经实现密封

4. The outer diameter of the pillar plug and the inner diameter of the sealing ring are sealed

5、该阀启闭速度较慢

5. The opening and closing speed of the valve is slow

四.法兰连接压力平衡直通式柱塞阀

IV. flange connected pressure balanced straight piston valve

1、流道：直通式

1. Flow passage: straight through

2、阀体、阀盖为铸钢件：阀杆、柱塞、隔离环为不锈钢；密封环、填料为柔性石墨或聚四

2. The valve body and bonnet are made of steel castings: the valve rod, plunger and isolating ring are made of stainless steel; the sealing ring and packing are made of flexible graphite or POLY-4

氟乙烯；阀杆螺母为铜合金

Fluoroethylene; stem nut is copper alloy

3、密封环、隔离环靠阀体和阀盖的连接螺栓、螺母及弹簧垫圈压紧

3. The seal ring and isolation ring are pressed against the connecting bolts, nuts and spring washers of the valve body and bonnet

4、靠柱塞的外径与密封环内径实现密封

4. Achieve the sealing by the outer diameter of the plunger and the inner diameter of the sealing ring

5、柱塞为空心，上下腔有通孔，阀杆用上密封套和螺母连接，使柱塞上下腔压力平衡，启

5. The plunger is hollow, and the upper and lower cavities have through holes. The valve rod is connected with the upper sealing sleeve and the nut, so that the pressure in the upper and lower cavities of the plunger is balanced and the plunger is opened.

闭时省力。不过阀杆要有上密封和填料密封

It saves time and effort. However, the valve stem shall be provided with upper seal and packing seal

6、该阀启闭速度较慢

6. The opening and closing speed of the valve is slow

五.截止阀形柱塞阀

V. stop valve plunger valve

1、流道：直通式

1. Flow passage: straight through

2 阀体、阀盖、柱塞体为铸钢；阀杆、柱塞压环为不锈钢；密封环、填料为柔性石墨或聚四氟乙烯

2. The valve body, bonnet and plunger body are made of cast steel; the pressure ring of valve rod and plunger is made of stainless steel; the sealing ring and packing are made of flexible graphite or polytetrafluoroethylene

3、阀体与柱塞密封环配合处镶有不锈钢衬套

3. Stainless steel bushing is inlaid at the fitting of valve body and plunger seal ring

4、密封环用柱塞压环压紧在柱塞体上

4. The sealing ring is pressed on the plunger body with the plunger pressing ring

5、靠柱塞密封环的外径和阀体衬套的内径配合实现密封

5. The sealing is realized by matching the outer diameter of the plunger sealing ring with the inner diameter of the valve body bushing

6、阀体、阀盖用螺栓连接，密封用垫片

6. The valve body and bonnet are connected with bolts and sealed with gaskets

7、阀杆密封用填料和上密封，压紧填料就可以实现密封

7. Packing and upper sealing are used for stem sealing, and the sealing can be realized by pressing the packing

8、阀杆传动用阀杆螺母，旋转手轮就可以启闭阀门

8. The valve stem can be opened and closed by using the stem nut and rotating the handwheel

9、该种结构的柱塞阀比常规柱塞阀启闭速度快

9. The opening and closing speed of the plunger valve with this structure is faster than that of the conventional plunger valve

六.法兰连接双阀座压力平衡直通式柱塞阀

Vi. flanged double seat pressure balanced through piston valve

1、流道：双口直通式

1. Flow passage: double port straight through type

2、阀体、上阀盖、下阀盖均为铸钢件；阀杆，柱塞，隔离环为不锈钢；密封环，填料为柔

2. The valve body, upper bonnet and lower bonnet are all steel castings; the valve rod, plunger and isolation ring are stainless steel; the sealing ring and packing are soft

性石墨或聚四氟乙烯

Graphite or polytetrafluoroethylene

3、密封环、隔离环柱塞导向套用上、下阀盖，螺栓、螺母、弹簧垫圈压紧在阀体内

3. The upper and lower valve covers are used for the sealing ring and isolating ring plunger guide sleeve, and the bolts, nuts and spring washers are tightly pressed in the valve body

4、柱塞可在上下密封环和导向套内上下运动，导向套上设有压力平衡孔，介质压力可由小孔进入导向套下腔。靠柱塞的双密封面和阀体内的双密封环就可实现密封

4. The plunger can move up and down in the upper and lower sealing rings and the guide sleeve. The guide sleeve is provided with a pressure balance hole, and the medium pressure can enter the lower chamber of the guide sleeve through the hole. The sealing can be realized by the double sealing surface of the plunger and the double sealing ring in the valve body

5、该阀为双阀座密封柱塞阀，可通过较大流量，由于柱塞较短，启闭速度比常规的柱塞阀

5. The valve is a double seat sealed plunger valve, which can pass a large flow. Because the plunger is short, the opening and closing speed is faster than the conventional plunger valve

大些

larger

6、阀杆密封采用上密封和填料，压紧填料压盖就可实现阀杆密封

6. The upper seal and packing are used for the valve stem seal, and the valve stem seal can be realized by pressing the packing gland

7、阀杆螺母镶在商上阀盖上旋转手轮就可带动柱塞阀启闭

7. The valve stem nut is inserted on the commercial valve cover, and the rotating hand wheel can drive the plunger valve to open and close

七、内螺纹连接直角式柱塞阀

VII. Right angle plunger valve with internal thread connection

1、流道：直角式

1. Flow channel: right angle type

八.法兰连接直角式柱塞阀

VIII. Flanged right angle plunger valve

1、流道：直角式

1. Flow channel: right angle type

九.法兰连接压力平衡直角式柱塞阀

IX. flanged pressure balanced right angle plunger valve

1、流道：直角式

1. Flow channel: right angle type