Floor Spring (In-Ground)

  • Model: TWS-8A
  • Fob Price: US $400 - 530 / Set
  • Lead Time: 3~15 Days
  • Warranty: 24 Months
  • Shipping: Worldwide by sea or by express delivery

The floor spring is an in-ground automatic swing door opener/closer. The components are concealed under the threshold. The floor spring provides an ideal way to automate doorways. The controller has various functional ports for microwave sensors, electric lock, and other accessories. The brushless DC motor is sealed and it’s waterproof, fireproof, and highly resistant to deformation and corrosion.

  • Brushless DC Motor.Small size, strong power.
  • High load capacity. Door weights up to 150kg per leaf.
  • The Max. load is 150KG. DSW-3 unit can be opened 90 degrees or 180 degrees, it’s optional. (It can automatically sense the passing direction of pedestrians, and open the door with the direction).
  • Integrated molding box. Thickened stainless steel panel. Anti-rust, anti-corrosion, not easy to be deformed.
  • Turbine rod, Helical gear rotation
  • Detachable screws, for easier maintenance.


The controller has a display debugging interface, which is simple to operate and set the parameters. It’s equipped with various function ports such as microwave sensor and electro lock.
The shell of unit is made of BMC; The DC motor is completely sealed and waterproof. It also has strong fire insulation and corrosion resistance.
The Max. load is 150KG. DSW-3 unit can be opened 90 degrees or 180 degrees, it’s optional. (It can automatically sense the passing direction of pedestrians, and open the door with the direction). It is cold-resistant and high-temperature resistant and it can work in -20℃-55℃ environment. Small size, waterproof, heavy load, easy construction, etc., It can be used indoors and outdoors.

Integrate Molding Box of electric floor spring


inside view of electric floor spring


The electric floor spring uses turbine rod and helical gear to make it rotate.

Steel ball and bearing inside of electric floor spring


The controller uses the latest technology. It can quickly and accurately read door leaf size and weight.

controller of electric floor spring



accessories of Electric Floor Spring

 remote control dsw 33a

Instructions for remote control

STUDY: Press the “STUDY” button, the buzzer will beep, then press any button on the remote control, the buzzer will stop beeping, indicating that the code is successful.

Empty: Press and hold the “STUDY” button until you can't hear the buzzer sound, then release the button.

A : Press A, the door will clockwise full open and hold open;

B : Press B, Automatic: Both the sensor signal and access control are effective;

C : Press C, the door will anticlockwise full open and hold open;

D : Press D, Lock: the sensor signal is shielded, but the access control works normally.



The floor spring operator is waterproof and can be used for a variety of outdoor doors such as courtyard gates, villa door community doors, etc.

waterproof feature of floor spring

Video of Electric Floor Spring 


Technical Specification

 Max.Weight of Body 150kg
Door width  1200mm
Opening and Closing Time 6~12s
Opening angle DSW3:90°/DSW3A:180°
Max.Torque 165Nm
Running Noise  <60dB
Electric Lock Output DC 12V
Rated Power 55W
Standby Power <2W
 Power Input  AC220V±10% 50~60HZ
 Unit Weight 5.5kg
Unit size 330×116×100(mm)
Operating Temperature -20℃+50℃
relation ship between door weight and width dsw 3 3a
 size of product

size of electric floor spring


Installation steps

1. Determine the installation position, and make the corresponding groove on the ground according to the unit operator dimension, and wire as required.

2. Before the operator is fixed under ground, power on to test the cable connections of operator output, controller, EM lock, etc..

3. Install the top brackets (Pic. a) on the crossbeam, and install the bottom brackets (Pic. b) and the rotating arm (Pic c) at the corresponding position of the door leaf.

4. After the operator is positioned, install the door leaf and adjust the relative position of the door leaf with the door frame through the adjusting screws for the operator and the brackets, and fix the operator by way of watering concrete or bracket fastening (Pic. d).

installation diagram of electric floor spring


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