M4-M40

In practical production, there are many waterproof and breathable valves that require metal materials to achieve higher strength and longer lifespan. The metal sleeve is used to install a threaded waterproof and breathable valve, commonly known as a respirator,  breathable screw, etc. This product uses the EPTFE membrane material jointly developed by our company and  partners. The shell is made of brass, aluminum, or stainless steel, and the membrane and shell are tightly matched  with the metal shell through interference fit, with stable performance. The installation is done with a straight blade,  and the torque should be controlled between 0.5 and 0.6NM. The specific adjustment depends on the size and  hardness of the matching installation screw and O-ring. Suitable for installation positions with countersunk holes or where some sleeves cannot be inserted. Good waterproof performance Quickly restore breathability by leaving the liquid surface The groove design ensures that the O-ring will not overflow

Main benefits:

·Dust and waterproof performance up to IP68

·Maintain air pressure balance, avoid expansion gas attacking weak links, prevent cracking and deformation, and extend the service life of the shell

·Maintain humidity balance, discharge moisture, alleviate fogging and condensation, protect internal components, and extend the lifespan of shell components

·Prevent electronic and inductive product failures caused by salt and water corrosion, and protect sensitive electronic and inductive products

·Simplify shell sealing design, reduce research and development costs, and reduce research and development difficulty

·Reduce production costs and reduce production difficulty

·Reduce maintenance and repair costs

·Waterproof, dustproof, and hydrophobic

·No dust accumulation, no water accumulation, no dust cake formation, maintaining smooth ventilation

·UV resistant and long-lasting

·Wide operating temperature range

·Easy installation and maintenance

·At the same time, high-quality flat pads have a long lifespan, do not break, and are resistant to fatigue.

·Safe, environmentally friendly, non-toxic, and without sharp edges

·Significantly reduce the after-sales failure rate, lower project costs, and solve the worries of enterprises.

Installation Guide

1. Installation location

The position of the installation hole should be prioritized to be perpendicular to the ground on the side, with the waterproof and breathable 

valve installed horizontally. Next, choose the bottom installation, and avoid positions that are easily covered 

by rainwater, dust, and other objects. To prevent the waterproof and breathable membrane micropores from being blocked by coverings.

2. Design of installation holes

The Le De M12 * 1.5 series products use a 14 * 9 * 2.5 O-ring with a hardness of 50 and a groove design to prevent O-ring overflow.

Suggest a typical installation hole with a chamfer of 120 degrees and a diameter of 14.2mm. The installation torque is suitable from 5.0 to 6.0 kgf.cm.

Lede Company's waterproof and breathable valve groove design facilitates users to better chamfer 

threaded holes within the specified torque range:

90 degree chamfer, applicable from 12.0 to 14.6mm.

A 120 degree chamfer can be applied from 12.0 to 15.0mm.

Precautions before installation

Before installation, it is necessary to prepare a suitable straight screwdriver and adjust the torque to 5.0 to 6.0 Kgf.cm.

The specific adjustment depends on the size and hardness of the matching installation screw teeth and O-ring.