全封闭螺旋盘绕316或347不锈钢/石墨阀体-阀帽密封垫
FULLY–ENCASED SPIRAL WOUND
316 or 347 SS/GRAPHITE BODY-BONNET GASKET |
| |
闸阀
Gate |
150磅级：DN50-DN65
300-1500磅级：DN50-DN900
Class 150: 2 –21/2"
(50 – 65 mm)
Class 300 –1500: 2 –36" (50–900 mm) |
截止阀
Globe |
150-600磅级：DN50-DN400
Class 150 – 600: 2 –16" (50–400 mm) |
止回阀
Check |
150-1500磅级：DN50-DN900
Class 150 –1500: 2 –36" (50–900 mm) |
|
|
结构特征：
DESIGN FEATURES:
- 全封闭使得密封垫在负载期间保持有利的径向支撑。
Full enclosure to allow gasket to retain positive
radial support during loading.
- 通过广泛的实验室测试，保证泄漏不会超过20 ppm。
Ensures leakage of no more than 20 ppm as demonstrated
through extensive laboratory testing.
- 通过密封环槽和精确公差和径向膨胀的精确留量实现压缩的精确控制。
Accurate control of compression through close
tolerance of gasket groove and allowance for radial expansion.
- 没有摇臂钻床加工痕迹。
No radial machine marks.
- 为了防止弯折，最少有三层内套。
Minimum of three inner wraps to prevent buckling.
- 最少有三个点焊。
Minimum of three tack welds.
- 最少有三个填料套。
Minimum of three filler wraps.
- 密封垫厚度公差精度达0.13 mm。
Close tolerance (± 0.005" or 0.13 mm) for
gasket thickness.
- 由于质量差异导致灵敏性差异，因此需要经常进行密封垫弹性测试和检查接受性。
Regular testing of gasket resiliency and inspection
at Receiving due to sensitivity to inconsistent quality.
- 现代扭转方式。
Modern torquing methods.
典型测试结果：
TYPICAL TEST RESULT:
DN250，300磅级阀门，3000次循环测试，泄漏为零 ppm。
3100 cycles with zero ppm for 10" Class 300. |
