Self Closing Door Closer Mechanism

At Waterson Closer Hinge, we specialize in self-closing door mechanisms, organized by system, type, and function. This unique framework not only provides clarity in understanding the various components and capabilities of our gate and door closer mechanisms but is also seamlessly applicable to our self-closing gate mechanism. Explore with us the precision and innovation in every design.

Each Waterson spring-loaded hinge is designed with innovative dual functions that are located on opposite ends of the barrel — spring tension (S) and swing speed (A). For example, our SA type provides spring tension (S) to close the door and swing speed (A) to reduce or adjust the closing speed. Waterson offers six distinct types — DS, SA, SA1, HS, SB & HA(noted on the inside leaf). These can be configured to meet your particular needs. For more information see the Hinge Type Table below.

Each door closer hinge type includes two of the following five different functions: spring power, swing speed, latch speed, hydraulic buffer, and hold open. Spring power refers to the closing force that causes door movement. Swing speed is the friction that causes the door to slow from 90° to 20°. Latch speed refers to the friction created to slow the door from 20° to 0°. The hydraulic buffer is the oil activation zone. Hold open and keeps the door open at 90°. For more information see the key functions below:

  S: The numerical panel (S) on the SA, SA1, SB, and HS types is an industrial spring that provides tension—closing force from 90° to 0°.

A: The hex nut end on the SA and HA types is a swing speed braking mechanism that functions from 90° to 20°.

A1: The hex nut end on the SA1 type is a latch speed braking mechanism that functions from 20° to 0°.

 H: Oil-engaged hydraulic component (H) on the HA and HS types provides the hydraulic buffer to create a quiet and smooth closing door swing.

B: The hex nut end (B) on the SB type is a hold-open feature keeping the door open at 85°.

Each hinge has two distinct functions, one adjusted from the hinge top, the other from the bottom. NOTE: hinges can be inverted.

When two door-closer hinges are installed, respectively installed at the upper and lower sides of the door. The distance from the edge of each of the door hinges to the door edge is 5”+/-1/8”(127+/-3mm). When the third door closer is installed, the third door closer is mounted adjacent to the upper door closer. The pivot centers of two adjacent door closets is spaced apart at least 10.95″(278mm).

In principle, it is sufficient to apply for doors of various specifications, weights, and materials by installing two to three door closers. When a fourth door hinge is required based on the practical requirement for a blast-resistant door or an extra heavy door, it is suggested that the distance between the pivot center of the fourth door closer and the pivot center of the second door closer is at least 10.95″(278mm).

Still don’t know how to install our spring-loaded hinges effectively? click here for Waterson Door Hinge Installation

Unlike most spring hinges, Waterson’s VISUAL numerical tension panel and patented speed control unit make the adjustment process much more assured and precise. Installers can effortlessly use the installation kit we provide (hex wrenches 3mm and 5mm to achieve the ideal tension based on different environments or user needs.

You can take a look at Waterson hinge Adjustment Instructions here.

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Please note that Waterson closer hinges start from a size of 4″x4″. If you’re in need of smaller self-closing hinges, we’d recommend checking out some other resources! Also, we only provide single acting closer hinges. Thank you.