High Performance Grilles
Take a moment to compare the differences and find out why The LAWRENCE Model PG and PT High Performance Grilles are an ADVANTAGE!
The Model PG is a truly high performance grille – Designed to operate for 500,000 cycles… Plus an average operating speed of 24 inches per second to open, 12 inches per second to close
The Model PT High Performance Tight-Coil Grille combines cycle life and speed features of the Model PG with a patent pending low headroom design that fits into as little as 12″ clearance.
| Product Features | Traditional Rolling Grille1 | LAWRENCE Model PG – PT High Performance Grilles | LAWRENCE Model PG – PT ADVANTAGE! |
|---|---|---|---|
| Cycle Life | 20,000 cycles | 500,000 cycles | Designed to last 25 times longer |
| Warranty | 2 years / 20,000 cycles | 2 years on grille – 5 years on motor operator / 500,000 cycles2 | Superior performance… superior warranty |
| Barrel Design | Torsion springs | Spring-less design | No springs to wear out or break – eliminates cost of barrel repairs and resulting down time |
| Grille Curtain – Links | 3-hole links (single 1/8″ thick links alternating with double 1/16″ thick links) | PG – 2-hole heavy straight links (all links 3/16″ thick) PT – 2-hole curved links (13/16″ wide x 5/32″ thick) | Thicker links better withstand repeated coiling of the curtain on itself; Shorter links are more resistant to bending; Curved links allow tighter coiling |
| Grille Curtain – Rods | Spaced on 2″ centers | PG – spaced on 1 1/2″ centers PT – spaced on 2″ centers | PG spacing provides greater strength and security; PT spacing allow tighter coiling |
| Grille Curtain – Rod End Sleeves | Aluminum sleeves on every other rod between end links | Stainless steel sleeves on every rod between end links | Stainless steel sleeves provide superior wear surface where curtain travels in the guides |
| Grille Curtain – Rod Ends | Cotter pins on ends of sleeved rods; Retaining rings on ends of other rods | Cotter pins on ends of all rods | Ends of all rods are mechanically secured to better maintain curtain alignment |
| Guides | 1/8″ thick extruded aluminum channels with HDPE wear strip inserts | 3/16″ thick oversize steel U-channels with replaceable UHMW wear strips | Oversize guides provide better operating clearance at higher speed; Steel guides are more durable than aluminum; Extruded UHMW wear strips are designed to last longer |
| Wall Angles | 3/16″ thick steel wall angles | 1/4″ thick steel wall angles | Heavier wall angles provide more rigid mounting for very high frequency / high speed use |
| Motor Operator | 1/2 HP in-line gear drive motor operator | 2 HP (min.) high efficiency in-line gear drive motor operator; Variable speed controller with soft start/stop feature; Integral speed governor | Complete assembly is designed specifically for very high frequency / high speed use; Variable speed allows grille to open fast but close at slower, safer speed; Soft start/stop extends life by slowing grille before full open and close to reduce shock loads; Governor prevents curtain free-fall in unlikely event of operator component failure |
| Operating Speed | Approx. 6″ to 8″ per second to open and close | Approx. 24″ per second to open, 12″ per second to close | Opens 3 to 4 times faster and closes 1 1/2 to 2 times faster than traditional rolling grilles – plus enhanced safety features are included |
| Cost3 | $$ | PG – $$$$$ PT – $$$$$$ | Superb value – 25 times the life for about 2 1/2 to 3 times the price of a traditional rolling grille! |
1 Features listed are for a Lawrence HG Grille and may exceed what can be expected on many other types of traditional rolling grilles.
2 Additional warranty conditions apply.
3 Cost comparison based on estimated initial cost for a 20′ wide x 8′ high grille, clear anodized finish, galvanized steel hood, monitored sensing edge, reclose timer, cycle counter, sales tax, and installation (not including power or control wiring).
Model Comparisons
Lawrence Roll-Up Doors, Inc. reserves the right to change specifications without notice. Refer to Standard Specifications sheets (available upon request) for complete product information. © 2024 Lawrence Roll-Up Doors, Inc.