Apeks Regulators
Apeks Alternate
Air Sources
Apeks BCD's
Apeks Instruments
Apeks Fins
Apeks Dry Bags
Apeks Tech Shorts
Apeks Dry Suits
Dealer log in
& Safety Notices
& Brochures
Apeks technical and recreational range in Thailand

Apeks Technical
- XTX Reversible Second Stage Valve Operation

<< Back to Technical Details Page

Pneumatically Balanced Reversible Valve System

Whether the spindle is set in the left or right-handed configuration, the diaphragm is drawn down as the diver inhales (shown below) depressing the lever. The lever tilts and lifts the balanced valve and rubber seating off the valve seat (orifice) allowing the air to flow through the valve mechanism to the divers' mouth. When the diver stops inhaling the diaphragm recovers and the spring pushes the poppet valve and rubber seating back onto the seat, preventing further air flow.

Picture Map

Pneumatically Balanced Reversible Valve System

The Balanced Spindle Mechanism can be set by your local dealer in either the left or right-handed configuration, depending on your individual preference. Combining existing technology with new ensures maximum performance and versatility, whilts retaining our world renowned reliability. The poppet valve allows air to pass through its centre to a counter-balance cylinder, which assists the spring to close the valve - eliminating the need for a heavier valve spring - reducing the breathing effort.

Valve Closed Position
Cracking Resistance Control

The Cracking Resistance Control is used to adjust the spring load of the poppet valve assembly and so vary the initial cracking resistance of the second stage. The further the control is wound in the greater the cracking resistance. The Cracking Resistance Control also incorporates an internal fine adjustment for use by an Apeks Service Technician. This allows the second stage to be set to a minimum breathing affort with a wide range of first stage medium pressures.

Valve Opened Position