P01 Series Core, standard-profile with Shield Technology for debris protection.
Standard-profile overpressure relief architecture, with component geometry configured for Shield-protected operation in debris-prone environments. Compatible with P01 flanges.
- ① LID DESIGN – OPV P01
- ② SPRING DYNAMICS – CONIC COIL
- ③ PLATE PROFILE – SECTOR
- ④ GASKET TYPE – SLOT-FIT
STANDARD-PROFILE. SHIELDED AGAINST DEBRIS EXPOSURE.
The P01 Series in Shield configuration extends the standard-profile relief platform for buoyancy and inflatable systems built around the P01 interface. Shield Technology adds passive debris protection where external contamination exposure is more demanding. A protected evolution of the established P01 relief layout for standard-profile system integration.

P01 SHIELD OPV
KEY FEATURES
Defined by Series interface, profile architecture, and platform function.
Stone
TOP PROFILE

Solid-profile design
Bold geometry.
Conic Coil
SPRING GEOMETRY

Conical geometry maximizes packaging efficiency and extends usable stroke for higher flow within a lower profile valve design.
SECTOR
GASKET PLATE

Sector profile with increased clearance geometry for higher capacity.
SLOT-FIT
GASKET DESIGN

Slot fit gasket with dedicated knot pocket for compact, low profile assembly.
EXHAUST CAPACITY

Maximum exhaust capacity

Flange diameter ~53 mm / ~2.09 in
Standard Profile
Min. collar height ~14 mm / ~0.55 in
Trapezoidal thread 3mm pitch
8-Ridge alternating interlock coupling section
PATENTED SYSTEM

Protection system engineered against particulates and debris.
ASSEMBLY & COMPONENT VIEWS
Complete assembly views and component breakdown.
AVAILABLE PULL KNOB OPTIONS
For OEM builds, multiple pull knob configurations are available at configuration stage, aligned with series supply.

BUOYANCY SYSTEMS · OVERPRESSURE RELIEF VALVES
CLEARANCE-DRIVEN DESIGN.
WIDE INTERFACE
COVERAGE.
ITALIAN ENGINEERING.
PREDICTABLE CONTROL.
Each HYDPRO device is engineered and manufactured in Italy: one chain from raw material to release. Polymer families are selected for constant immersion, precision-drawn brass runs on in-house CNC lines, and every device leaves built, tested, and signed off under one roof.


Built to integrate. True to your setup.
Whatever the field runs, HYDPRO builds to it natively: every established mount standard, thread, and host geometry, covered from the factory. Your setup stays as it is, integration stays clean, and the response repeats: the same command, the same result, on every dive.
Proven by divers. Refined by decades.
Four decades in the water stand behind the current generation. What wears, what binds, what drifts out of tune comes back from real dives to the bench, and the next revision answers it. Control you can feel, refined one generation at a time.