1. The distance between the end of the anchor shot or shotcrete support and the excavation working face, the form, specification, installation angle of the anchor bolt, the concrete marking, thickness, the shape and specification of the metal mesh used for the hanging net, and the surrounding rock gushing water Treatments, etc. must be specified in the construction organization design or operating procedures.
2. Smooth blasting should generally be adopted for rock tunnels that are drilled and blasted.
3. Before hitting the anchor rod, it is necessary to knock on the top of the anchor and dispose of the living quail before drilling. Temporary support must be set up if handling a livelihood can be dangerous.
4. When rebar (or other rod) mortar bolts are used, the eyes must be cleaned and filled with grouting mortar.
5, spray should use wet or wet spray. Before blasting, rocks must be washed. There should be conservation measures after spraying. Staff must wear labor protection supplies.
6, the anchor rod must be done according to the provisions of tensile tests. The thickness and strength of the shotcrete should be checked, and there are inspection and test records. When testing the anchorage force downhole, there should be safety measures.
7. The pallets of the anchor must be tight against the lane wall and tightened with fasteners.
8. For the roadway with anchor spray or shotcrete support, during the construction process, the quality must meet the design requirements. After the completion of the construction, the designated personnel should also be inspected regularly to identify problems and deal with them in a timely manner.
9. The location of the gushing water in the rocky gang must be treated to prevent the shotcrete from falling off at the rocky juncture.
10. When dealing with blocked injection lines, no other personnel are allowed in front of or near the mouth of the spray gun to prevent sudden injection and pipe runout.
Water Solenoid Valve Armature Assembly
The category of armature assembly used in Water Solenoid Valve.
1. The tube OD sizes range from 5mm to 23mm, big than 23mm is also available
2. The valve seat orifice sizes ranges from 0.6mm to 4.0mm and higher for special applications.
3. Choose the suitable material for the application as Brando offers plunger tubes in brass and stainless steel.
4. Spring: Rustproof SUS304 stainless steel, with good performance of restore.
5. Seals: Options of NBR, HNBR, FKM, EPDM, PTFE, food grade materials, welcome your other requirements.
6. Shading ring: Cooper and silver material available.
7. Washer and retaining nut provided if has demands.
Water Solenoid Valve Armature, Water Solenoid Valve Plunger, Water Solenoid Valve Armature Plunger
NINGBO BRANDO HARDWARE CO.,LTD , https://www.brandopneumatic.com