Instruction and Maintenance Manual for Ball Valve 300LBS
(Material: Body: WCB, Ball & Stem: SS316, Body seat: RPTFE)
1. Main application and service scope
- Application
The product is designed for industrial pipelines in Petroleum & Chemical sectors as mediums’ cut-off devices. It is not recommended for regulating purpose.
- Service scope
Temperature (ºC): □–29~121 ■–29~425 □–29~595 □–46~345 □–196~600 □Others
Mediums: ■Water □Steam ■Oil ■Gas □Liquid
Pressure rating (Bar): □20 ■50 □64 □100 □150 □250 □420 □Others
Working pressure (Bar): 50
- Applicable standard:■API ■ASME/ANSI □MSS □BS □ASTM □Others
- Performance features:
| Performance Features | ||||||
| Pressure rating PN (bar) □20 ■50 □64 □100□150 □250 □420 □Others | ||||||
| Working Mediums ■Water □Steam ■Oil ■Gas □Liquid □Others | ||||||
| Service temperature (ºC) □–29~121 ■–29~425 □–29~595 □-46~345 □-196~600 □Others | ||||||
| Test Pressure
(Mpa) |
Shell | 1.5 x PN | Test Mediums | Water | Test
Temperature (ºC) |
Normal |
| Seat | 1.1 x PN | Water | ||||
| Low Pressure
Air Tightness |
0.6 | Air | ||||
- Main construction characteristics:
4.1 Ball: □Float ■Trunnion □Others
4.2 Body: □Integrated ■2-piece □3-piece □Others
4.3 Valve’s connection type: ■Flange □Welded □Threaded □Others
4.4 Seat: ■Trunnion □Float □Others
4.5 Pattern of packing: ■Shaped □Shaped with soft □O-ring □Others
4.6 Safety drainer required: □Yes □No
4.7 Anti-static & fire-safe constructions required: ■Yes □No
4.8 Operation manner: ■Manual □Electric □Pneumatic □Hydraulic □Others
4.9 Ball valve’s opening and closing are achieved with aid of ball’s one quarter turn round the vertical stem. It’s compact of construction, quick on-off operation. For special large size, the floating seat ring and trunnion ball was applied on them. It’s low torque & easy operation. This product is widespread for services in piping systems of petroleum and natural gas. Spherical surface and annular seat with pre-tightening force and medium’s action will reach sealing that enables high reliability in sealing and long working life.
- Installation and usage:
5.1 Installation
5.1.1 The valve’s installation position should be facilitated to proper operation and maintenance.
5.1.2 Before making installation, the valve size & type, performance features, technical requirements, name-plate & service identification, etc shall be checked and verified conforming to the related working conditions.
5.1.3 Clearing inside valve free of dirt and rusty spots to ensure sealing face cleaned.
5.1.4 Making sure whether the fasteners were fastened uniformly, packing pressed enough, & valve’s on and off operations agilely. Also whether on and off positions operated by other type of actuators were built accurately. Installation can be done only after all the checking completed well.
- Usage
5.2.1 The valve can only be used for on and off the pipeline, but it is in no case used for regulating purpose. Particularly, it’s not allowed to be operated at working conditions of over temperature and pressure limits and frequently alternating pressures. The bolts can be fastened periodically at high temperature to avoid leakage and to decrease heat gradient. Be cautious of not make the valve working at low temperature with impact load and high stress concentration.
5.2.2 Regularly re-inject seal grease and soft packing to ensure a sound condition kept.
5.2.3 The valve should stay at open or close status, not good being as regulating. When operating with non-manual operated, the valve’s opening and closing positions, on/off buttons of control board and its indication should show consistencies to avoid incorrect operation.
5.2.4 In regard to measures for anti-earthquake, fatigue and creep, the customer would be required to take attention for a solution to satisfy special working conditions in installation and application.
5.2.5 Wall thickness allowances were given for customers’ determination of adaptation to its mediums.
- Maintenance and storage
6.1 Maintenance
6.1.1 Valves in operation shall have to be checked and maintained at regular intervals and kept it in a sound condition, otherwise, the valves might be rusty and blocked due to long time non-movement.
6.1.2 If some leakage arose on the stuffing box, checking its pressure to see if the packing was pressed good enough. If soft packing was applied for seal, refilling the same soft packing until no more leakage occur.
6.1.3 There are some leakage found at flanges, retighten the fasteners uniformly until no more leakage occurred.
6.1.4 When inner leakage emerged at sealing faces, checking the valve to see whether the valve closed in place, & there are some foreign matters on sealing faces. If possible, opening and closing again the valve for a trial to see if it’s still leaking.
6.1.5 Having maintained as clauses 6.1.2, 6.1.3 & 6.1.4, but witnessed sustainable leakage happened, the valves need further examination and repair.
6.1.6 At maintenance, the parts shall be re-cleaned, & foreign matters, dirty slag and rusty spots be cleared. Damaged gaskets and packing shall be renewed, & sealing faces reconditioned. The maintained valve that has been successfully subjected to a new hydrostatic test can only be put into operation again. For the valve with safety drainer, the draining pressure has to be reset, value of which is less than 1.1 times the related working pressure-temperature ratings.
6.1.7 During the maintenance, the valve’s parts can be replaced, but the new parts must satisfy original application demand.
- Storage
6.2.1 The valves shall be stored inside the dried warehouse in order, & absolutely not allowed to be stacked at open-air place.
6.2.2 The Valves shall be stored at opening status, the both ends of the valve must be covered with caps to avoid foreign matters, dirty stains and rusty spots, and coated with anti-rust oil (grease). When necessary, open and close the valve one time to avoid rusting and blocking, & thereafter, recover the caps and open the valve for storage.
