OB03 Heavy-Duty Cast Iron Door Closer
This series boasts authoritative certifications and superior performance, backed by ANSI A156.4 Grade 1 certification and UL/cUL 3-hour fire ratings, while fully complying with ADA accessibility standards. It is equipped with anti-loosening locking control valves and supports an optional delay action function. The spring force can be adjusted on-site from Size 1 to Size 6 without disassembly, supporting doors up to 330 lbs (approx. 150kg).
Technical
- Closing Force：EN 1-6 or 8
- Applicable Door Weight：15kg-150kg or 150kg-220kg
- Applicable Door Width：750mm-1400mm or ≥ 1400mm
Product Parameters
| Item No. | Applicable Door Weight(kg) | Applicable Door Width(mm) | Installation Style | Function | Power Size | Certificates | Notes |
|---|---|---|---|---|---|---|---|
| OB03BC | 15-150 | 750-1400 | · Standard Installation · Parallel Installation · Top Jamb Installation · Slide Arm Installation | · Adjustable Closing & Latching Speed · Back Check · Arm with hold-open function (Optional) | 1-6 | UL UL10.C ANSI 156.4 Grade 1 | · American Style Designed, Heavy Duty for Commercial Doors · Precision Heavy Duty Rack(Piston)& Pinion Gear, Needle Bearing · Slim/Full Plastic Cover (Optional) · Power Adjustable #1, #2, #3, #4, #5, #6 by Power Adjustable Valve · Optional Parallel Arm installation (P.A. Bracket can be provided upon Request) |
| OB03DA | 15-150 | 750-1400 | · Standard Installation · Parallel Installation · Top Jamb Installation · Slide Arm Installation | · Adjustable Closing & Latching Speed · Delay Action · Arm with hold-open function (Optional) | 1-6 | UL UL10.C | · American Style Designed, Heavy Duty for Commercial Doors · Precision Heavy Duty Rack(Piston)& Pinion Gear, Needle Bearing · Slim/Full Plastic Cover (Optional) · Power Adjustable #1, #2, #3, #4, #5, #6 by Power Adjustable Valve · Optional Parallel Arm installation (P.A. Bracket can be provided upon Request) |
| OB03BCDA | 15-150 | 750-1400 | · Standard Installation · Parallel Installation · Top Jamb Installation · Slide Arm Installation | · Adjustable Closing & Latching Speed · Back Check · Delay Action · Arm with hold-open function (Optional) | 1-6 | UL UL10.C | · American Style Designed, Heavy Duty for Commercial Doors · Precision Heavy Duty Rack(Piston)& Pinion Gear, Needle Bearing · Slim/Full Plastic Cover (Optional) · Power Adjustable #1, #2, #3, #4, #5, #6 by Power Adjustable Valve · Optional Parallel Arm installation (P.A. Bracket can be provided upon Request) |
| OB03T | 150-220 | ≥ 1400 | · Standard Installation · Parallel Installation · Top Jamb Installation · Slide Arm Installation | · Adjustable Closing & Latching Speed · Back Check · Arm with hold-open function (Optional) | 8 | / | · American Style Designed, Heavy Duty for Commercial Doors · Precision Heavy Duty Rack(Piston)& Pinion Gear, Needle Bearing · Slim/Full Plastic Cover (Optional) · Optional Parallel Arm installation (P.A. Bracket can be provided upon Request) |
Application Scenarios
Commercial Buildings: Offices, shopping malls, hotels, restaurants and retail stores
Public Facilities: Hospitals, schools, airports, libraries and government buildings
Fire Safety: Fire doors, stairwells and emergency exit passages
Residential & Apartments: Entrance doors, common areas and multi-family housing
Industrial & Special Use: Factories, server rooms, climate-controlled spaces and high-traffic areas
FAQs
What types of doors is the OUBAO OB03 Series suitable for?
The OB03 Series is designed for various door types, including wooden and metal doors.
Is this door closer suitable for both left and right-hand doors?
Yes, the OUBAO OB03 Series features a non-handed design. A single unit can be installed on either left-hand or right-hand opening doors, which greatly simplifies installation and inventory management.
Do you provide OEM services for this door closer?
Yes. As a direct source manufacturer, we offer comprehensive OEM and ODM services. We can customize surface treatments, packaging, and specific spring strength configurations to perfectly align with your brand requirements.
Does this series support hold-open function?
Yes, the OUBAO OB03 Series can be equipped with a hold-open arm to realize the hold-open function.
