IOM-BLV-D-006
REV.01
PAGE 10 of 21
2. Description
D series ball valves 2” FP to 6” RP are full bore, through conduit, bi-directional, anti-blowout stem,
double block and bleed with trunnion mounted ball for easy operation.
These valves are equipped with seats with plastic insert; self relieve type seats to eliminate cavity
pressure lock. The trunnion ball valve uses metal- backed self lubricating PTFE sleeve bearings and
thrust washers to reduce torque. The stem and lower trunnion is separated from the ball to eliminate
side loads.
The lever and wrench head can be easily removed/ reassembled by means of set screws.
The handwheel can be removed from the gear shaft by taking out the split pin.
3. Safety Information’s
Valves shall be operated and maintained strictly in accordance with these procedures. Operation or
maintenance outside of these procedures constitutes abuse of the product and voids all warranty and
claims.
When special operation is required, a formal written request to the company must be made for
approval to operate in this manner if warranty and product liability is to be maintained.
Before any work is performed on a valve, personnel working on the valve must obtain the proper work
permits required by his employer. Personnel shall always use safety precautions set forth by the law
and regulations required by his employer. Personnel shall also be aware that any venting or draining of
fluids from the valve shall be done in accordance with safety and environmental procedures in force at
the particular location.
The maintenance personnel doing the repairs should be well trained, and familiar with all of the
information contained in this manual.
The valves shall be appropriately used for the intended purpose. Any safety or protection devices on
the valve shall not be permanently removed or altered unless written approval is received from AOP
representative.
Transport, unpacking, lifting, connections to the different types of systems (electric, pneumatic,
hydraulic systems, etc.) shall be made by expert and qualified personnel
Should any difficulties or abnormalities arise which cannot be solved by the technician, contact AOP
representative.
Any servicing not covered by these instructions must be made by an authorized service center, after
preliminary approval has been given by AOP representative.
4. Installation and storing
Valves delivered by AOP
After the valves have been assembled and tested, the valves are drained and painted.
Sealing surfaces of connection flanges are greased and covered by protectors.
All valves are delivered in fully open position, unless is actuated with a normal close position actuator.
If the valve is lever operated, the lever may be separately packaged for easier handling and
transportation.
If the valve has a gear operator, the gear is installed on the valve and factory adjusted for open and
closed position. The gear handwheel may be separately packaged for easier handling and
transportation.
