The Hydraulic Solution . . . Simple Concept and Seamless Design . . . Mike Schweiss, President of Schweiss Doors, says hydraulics are a powerful, clean, simple, and trouble-free method of operating the doors, and they operate smoothly and quietly. He says the company uses cylinders with larger rod diameters than required for added strength and safety — with rod diameters from 1½ inch to 4 inch, depending on door height, size, and weight. He also notes that the cylinders are beefed-up and strengthened at critical points to avoid putting stress on the cylinders or cylinder pins.
Hydraulic Safety . . . Because of their size and weight, large hydraulic doors require safety features to prevent damage or injury from uncontrolled closing due to a power outage or failure of a hydraulic line. Schweiss incorporates counterbalance valves on all doors, causing the door to lock instantly in any position when not being operated, even if a hydraulic line should leak or burst. Pumps are driven by continuous-duty motors protected by fuse and overload devices. Low-voltage 24v DC control stations with low-voltage coil connectors provide greater user safety.
Hydraulic Backup Solution . . . This hydraulic power unit (HPU) includes a rechargeable battery to allow operating the door in the event of a facility power failure. The HPU can also be mounted above ground on a wall or in a remote location. Additional features include several alternative methods to operate
the door safely in case of power failure. Each unit comes with a standard
tractor hydraulic connection, which is particularly useful for agricultural or
industrial applications. A built-in manual override allows an operator to
lower the door during a power outage, and a DC battery backup also is
equipped with a hex head that allows an impact wrench or drill to operate
the door in either direction if necessary.
The Hydraulic System . . . Power Up and Power Down . . .
Schweiss explains that all of the hydraulic oil in the system that
passes through the directional valve gets filtered. There is a small
amount of oil in the cylinder and the hard lines that never gets
back into the tank to mix with the oil that gets filtered. The pump
includes a filter-clogging indicator that shows when to change
the filter element, this also reduces any chance of an oil mess.
The system’s 3,000 psi pressure gauge is standard and shows
the pump pressure used to open the door.
Smart Hydraulic Design . . . Schweiss Doors, Hector, MN,
offers both types of doors and has developed design features
specifically addressed to improve hydraulic door operation over
other designs. At the heart of the companys’ system is a hydraulic gear pump
driven by an electric motor ranging in size from 2 hp to 20 hp. The complete HPU is a
compact package that can be mounted anywhere in a building, whether on the floor or a wall
close to the door or further away.
UL-listed electrical components are housed in control boxes, including contactors, transformers, relays, motor timers, rectifiers, and control fuses. The gear pump is 95% efficient and operates quietly at 1,800 rpm. The HPU also incorporates a 3,000-psi pressure gauge, fluid temperature gauges, and a service filter.
Hydraulic Cylinders Handle Heavy Doors . . . Hydraulic cylinders provide the strength and reliability to open and close large, heavy doors on airplane hangars as well as agricultural, commercial, industrial, and residential buildings. They offer smooth, quiet operation, and the one-piece doors create a large, shaded canopy when open.
Hydraulic systems are often the first choice for opening and closing gigantic one-piece doors used on airplane hangars, agricultural buildings, and structures requiring large openings, sometimes exceeding 100 ft. in width and weighing well over 10,000 lbs. These doors need powerful mechanisms to operate smoothly and dependably. Hydraulic power is ideal and adaptable to any size door by increasing cylinder size in proportion to door size and weight.
One-piece doors are preferable in these applications because they swing up and away from the building, and their operation is simple. They do not protrude inside the structure like roll-up doors, which can reduce headroom. Bifold doors, on the other hand, pivot outward as they are raised. This feature presents a different set of advantages and disadvantages. Because bifold doors lift from the bottom, lifting force can be distributed across the width of the door. An electromechanical drive is generally used for these doors, but because
one-piece doors must be pivoted from both sides, hydraulics is generally used.
A big advantage of the one-piece doors is that they provide a large, shaded canopy outside the building when open. With hydraulic power, the doors can be clad with almost any material, including heavy glass and steel siding. Entire storefronts have been incorporated
into door designs.
Remote Control Operated Doors
Let you open/stop/close your hydraulic door from
any vehicle. It automatically unlatches the door so
it can be opened or closed with the handheld
remote.Two handheld remote controls and
antennas are included with each door.
Customers really enjoy this feature! All doors
equipped with remote operators should have a
warning system to alert persons in the immediate
area that the door is about to open or close.
"In today's world, you wouldn't buy a car
without air conditioning, so why would
you buy a door without remotes!"