lined PTFE stop valve
Other Products
I. Introduction:
J41F4-16C PTFE-lined Globe Valve belongs to the forced-seal type valve. Therefore, when the valve is closed, pressure must be applied to the disc to force the sealing surface to prevent leakage. When the medium enters the valve chamber from below the disc, the resistance that the operating force needs to overcome is the friction between the stem and the packing and the thrust generated by the pressure of the medium. The force required to close the valve is greater than that required to open it, so the diameter of the stem must be large; otherwise, the stem may bend due to excessive force. In recent years, since the advent of self-sealing valves, the medium flow direction of globe valves has been changed to enter the valve chamber from above the disc. At this time, under the action of medium pressure, the force required to close the valve is small, while the force required to open the valve is large, so the diameter of the stem can be reduced accordingly. At the same time, under the action of the medium, this type of valve is also more tightly sealed.
II. Features:
Simple structure, relatively convenient to manufacture and maintain.
Small working stroke, short opening and closing time.
Good sealing performance, small friction between sealing surfaces, long service life.
III. Performance Specifications:
Lining, Seat | Applicable Temperature (℃) | Applicable Medium |
PTFE (F4) | ≤180 | Strongly corrosive media such as acids, alkalis, salts, aqua regia, organic acids of various concentrations, except for molten alkali metals and elemental fluorine |
PCTFE (F3) | ≤120 | |
FEP (F46) | ≤150 | |
PFA (Fusible F4) | ≤180 | |
PVDF (F2) | ≤100 | |
RPTFE (RF4) | ≤180 |
IV. Installation:
Globe valves operated by handwheels or handles can be installed at any position on the pipeline.
Handwheels, handles and transmission mechanisms are not allowed to be used for lifting.
The flow direction of the medium should be consistent with the direction of the arrow marked on the valve body.
The globe valve, also called a stop valve, is one of the most widely used valves. It is widely popular because during the opening and closing process, the friction between the sealing surfaces is small, it is relatively durable, the opening height is not large, it is easy to manufacture and convenient to maintain. It is applicable not only to medium and low pressure but also to high pressure. Its closing principle is that by relying on the pressure of the stem, the sealing surface of the disc is closely fitted with the sealing surface of the valve seat to prevent the flow of the medium.
Globe valves only allow the medium to flow in one direction, so they have directionality during installation. Their structural length is longer than that of gate valves, and they have large fluid resistance. During long-term operation, their sealing reliability is not strong.
Globe valves are divided into three categories: straight-through type, angle type and straight-flow type (oblique globe valve)
| Industry Category | Machinery & Equipment/Valves/Globe Valves |
|---|---|
| Product Category | |
| Brand: | 上海舟腾 |
| Spec: | J41F4-16C |
| Stock: | 99 |
| Manufacturer: | 上海舟腾泵阀制造有限公司 |
| Origin: | 113120 |
