阀门操作手册 上海FLowx阀门有限公司
Publish Time: 2021-11-08 Origin: Site
INSTRUCTION OF BUTTERFLY VALVE
STORAGE, INSTALLATION, USE AND MAINTENANCE
STORAGE
*The butterfly valve should be deposited in the dry indoor place; the disc opens at 4°-5°.
INSTALLATION：GENERAL INSTRUCTIONS
* This butterfly valve may be installed on the optional position of the pipeline.
* The installation position should guarantee the convenience of usage, maintenance and also replacement.
* When installation, the medium flow direction may not be taken into consideration.
FITTING ON PIPEWORK
* Checking whether application condition is the same with the valve performance standard.
* Cleaning the cavity and sealing surface, don’t allow any contamination to adhere, before cleaning, don’t open or shut the disc.
* Inspect the handle whether reliable with the flange connection, the handle set screw whether firms with the seal.
* After installation, when performing the pipeline intensity test, the disc must be in opens state.
USE AND MAINTENANCE
* After installation the valve, the valves should be inspected at regular time.
* Whether there is any damage occurrence on valve seat and also on O-ring.
* Sealing function of disc sealing surface.
* After overhaul and assembly, the blocking phenomenon is not allowed when opening and shutting.
* After overhaul and assembly, sealing performance test should be carried on according to the standard.
1.Weight
SIZE | Weight of Bare Shaft Wafer Butterfly Valve （Kg） |
2” | 2.2 |
2.5” | 2.5 |
3” | 2.9 |
4” | 4.3 |
5” | 6.1 |
6” | 7.8 |
8” | 12.2 |
10” | 18.8 |
12” | 28.7 |
2.Parameter
3.Possible breakdown occurrence and method of eliminating
Break down of possible occurrence | Possible reasons | Method of removing |
Sealing surface leakage | Collision damage of seat, disc scratch, or block phenomenon between seat and disc. | Replace the Seat or examine &repair disc. |
Leakage from end of stem | The axle hole of butterfly valve seat damages, the sealing of O-ring abate | Replace the seat or O-ring |
Leakage of connection area from two ends of BV with flange ends surface of the pipeline. | The connecting bolts are not tight enough or uneven connected or reason of aging seal | Tighten and even the connection or change the valve seat |
4.Correct Installation & Incorrect Installation
Correct Installation
Incorrect Installation