|
|
|
 |
|
Description | Features | Installation | Technical Details | Advantages | Applications
|
|
|
|
 |
|
FRP Pit Cover
Earthing Inspection Pits can be manufactured from a variety of materials. FRP for its light weight is an ideal choice.
The physical qualities of FRP with its excellent dielectric properties, high mechanical strengths, chemical resistance and zero water absorption make it ideal for this application.
JMV's light weight earth inspection housing has a maximum safe working load of 2000 kilograms. It is UV stabilized against degradation by sunlight and non-brittle to prevent cold weather damage.
The unique, detachable easy-locking lid ensures security of equipment . The base has built-in slots for locating earth bars. Its light weight feature allows easy handling, storage and transportation.
|
Frp Pit Cover
|
|
|
|
Features
• Designed specifically for Earthing Inspection Chambers.
• Durable mild FRP cover and body, giving a neat edge design.
• Square top to aid block pavior cutting.
• Circular clear opening to fit inspection chambers.
• Solid tray base plate.
• Manufactured under an ISO 9001:2000 Quality System.
|
|
|
|
|
Installation
Ground Preparation
Excavate the hole to suit the pit, put a bag mix concrete pad to the pit to sit
on, in order to create an even solid base.
|
|
|
Pit Placement
Set the pit in place, and connect the appropriate pipe work to the pit.
With a grated pit the grates sits inside the pit.
|
|
|
Back Fill
Back Fill the hole with stabilized crushed rock or concrete depending on the load
classification.
|
|
Protective Edge
All pits require a concrete surround at the top edge of the pit for protection against vehicle impact.
|
|
|
|
Return to Top |
|
Technical Details
FRP Earthing Inspection Cover possesses excellent resistance to organic solvents, degreasing agents and electrolytic attack. It is light in weight, resistant to staining, and has a low moisture absorption rate. This is a tough, heat-resistant, semi-rigid material, ideal for the transfer of hot liquids or gases. It has excellent resistance to acids and
alkalis.
|
Typical properties of FRP Earthing Inspection Cover offered by JMV |
| Property |
Unmodified Resin |
| Specific gravity |
0.905 |
| Specific volume (in.³/lb.) |
30.8-30.4 |
| Water absorption, 24 hours, 1/8 inch thick (%) |
0.01-0.03 |
Mechanical |
| Tensile strength (psi) |
5,000 |
| Elongation (%) |
10-20 |
| Tensile modulus (10~5 psi) |
1.6 |
| Flexural modulus (10~5 psi) |
1.7-2.5 |
| Impact strength, izod (ft-lb/in. of notch) |
0.5-2.2 |
| Hardness, Rockwell R |
80-110 |
Thermal |
| Thermal conductivity (10~4 cal-cm/sec-cm~2-°C) |
2.8 |
| Coefficient of thermal expansion (10~5 in./in.-°F) |
3.2-5.7 |
| Deflection temperature (°F) At 264 psi |
125-140 |
| Deflection temperature (°F) At 66 psi |
200-250 |
| Flammability rating |
HB |
Electrical |
| Dielectric strength (V/mil) short time, 1/8-in. thick |
500-660 |
| Dielectric constant At 1kHz |
2.2-2.6 |
| Dissipation factor At 1kHz |
0.0005-0.0018 |
| Volume resistivity (ohm-cm) At 73°F, 50% RH |
10~17 |
| Arc resistance's) |
160 |
|
|
|
| Return to Top |
|
Advantages
The physical qualities of JAM Cover with its excellent dielectric properties, high mechanical strengths, chemical resistance and zero water absorption make it ideal for electrical applications. More features :
• Lightweight, compared to cement concrete.
• Easy to handle.
• Manufactured from chemical and corrosion resistant.
• Easy to cut with disc grinder and masonry drill.
• No steel reinforcement.
• Easy to fit and seal dividing walls.
• High tensile strength.
• Impact resistant.
• High compressive strength.
• Excellent dielectric properties.
• Resists most alkalis and acids.
• Resists stress cracking.
• Retains stiffness and flex.
• Low moisture absorption.
• Non-toxic.
• Non-staining.
• Easily fabricated.
• High heat resistance.
|
|
|
|
|
Applications
• Agricultural
• Commercial
• Industrial
• Institutional
• Residential
|
|
|
Return to Top |
|
|
|
.gif){kind=small}
Lightning Protection System
ESE Lightning Protection System
