Advertisement
Quick Links
SAPAG
www.valves.emerson.com
Pressure Seal Gate Valves -Style A-
Installation and Maintenance Instructions
Cast Gate Valves Pressure Seal -Style A-
Wedge Gate and Parallel Slide Configuration
Contents
1
1.1
1.2
1.3
2
2.1
2.2
2.3
2.4
Table II: Bolt Torque to Ensure Tightness of Pressure Seal Gasket
2.5
3
3.1
3.2
4
5
5.1
Table III: Grease and Lubricant List
5.2
Section 1 - Valve Storage
1.1 Preparation and Preservation for Shipment
All valves are properly packed in order to protect the parts that are subject to deterioration during
transportation and storage on site. In particular, the following precautions should be taken:
1. The valves must be packed with the wedge in the closed position.
2. The weld ends surface shall be protected with suitable protective like Deoxaluminite. The end
shall be closed with plywood or plastic disc fixed at the edge by strips.
3. All actuated valves must be carefully securely palleted or crated, in order to ensure that the
parts of actuator (especially pneumatic piping or accessories) do not extend beyond the skid/
crate.
4. The type of packing must be defined in the Customer's Order and shall be appropriate to ensure
safe transportation to final destination and eventual conservation before installation.
1.2 Handling Requirements
A - Packed Valves
Crates: Lifting and handling of the packed valves in crates will be carried out by a fork lift truck, by
means of the appropriate fork hitches.
Cases: The lifting of packed valves in cases should be carried out in the lifting points and at
the center of gravity position which have been marked. The transportation of all packed
material must be carried out safely and following the local safety regulations.
B - Unpacked Valves
1. The lifting and the handling of these valves has to be carried out by using appropriate means
and at respecting the carrying limits. The handling must be carried out on pallets, protecting the
machined surfaces to avoid any damage.
2. With valves of large dimensions, the sling and the hooking of the load must be carried out using
the appropriate tools (brackets, hook, fasteners, ropes) and load balancing tools in order to
prevent them from falling or moving during the lifting and handling.
Emerson reserves the right to change the contents without notice
1
1
1
2
2
2
3
3
3
4
4
4
4
5
5
5
6
6
6
6
6
SAPLT-0028-EN-1308
Advertisement
Related Manuals for Emerson SAPAG
Summary of Contents for Emerson SAPAG
-
Page 1: Table Of Contents
2. With valves of large dimensions, the sling and the hooking of the load must be carried out using the appropriate tools (brackets, hook, fasteners, ropes) and load balancing tools in order to prevent them from falling or moving during the lifting and handling. www.valves.emerson.com Emerson reserves the right to change the contents without notice SAPLT-0028-EN-1308... -
Page 2: Storage And Preservation Before Installation
Verify that the direction of the flow in the line corresponds to the arrow indicated on the valve body. Valves without the arrow are bi-directional. See the actuator user manual for the actuator preparation. Emerson reserves the right to change the contents without notice page 2... -
Page 3: Installation Instructions
For a correct operation, Sapag recommends that the valve shall be installed and oriented following the indications of fig. 2. This can help minimize any problem associated with solid particles present in the fluid that otherwise could deposit in the lower part of the body and be obstacle to the wedge complete closure. -
Page 4: Periodic Valve Verification During Service
1. Loosen gland nuts, cycle the Jerky operation valve, retighten 2. Air supply inadequate 2. Increase air supply pressure (for pneumatic act.) 1. Back seat damage 1. Replace the back seat Back seat leaking Emerson reserves the right to change the contents without notice page 4... -
Page 5: Maintenance
This manual describes on site repairs as: - Packing Replacement - Body/Bonnet Gasket Replacement All the other repairs should be performed by Sapag or Nominated Service Company. 3.1. Packing Maintenance If leakage is observed through the packing, tighten the gland nuts slowly and evenly until the leakage stops. -
Page 6: Valve Removal
5m, without any abrasive agent. For the lubrication of the actuator, refer to the relevant manual. 5.2 Special Tools No special tool required for the Maintenance Operation described in this Manual. Emerson reserves the right to change the contents without notice page 6...