Products
Relief Valves
Relief Valves
Precision calibrated reliability with a competitive price.
SeaVent valves are designed to prevent catastrophic explosions of subsea housings caused by internal pressure buildup (battery off gassing or thermal expansion) by automatically venting internal pressure once it exceeds a set cracking pressure.
PRV
Double Dual Seal
o-rings
10 psi
Our SeaVent Double Dual Seal (DDS) uses dual O-rings for redundant protection against leaks. Hexagonal sides at the base of the DDS allow for easy installation with a standard wrench. The DDS is offered in either PEEK or titanium with a cracking pressure of 10 psi. A vacuum and fill attachment is available.
PRV
Single Dual Seal
aluminum
stainless steel
titanium
The Single Dual Seal (SDS) can be specified with a cracking pressure range of either 5-15 or 15-25 psi. Materials include aluminum, stainless steel, or titanium. A vacuum attachment is available.
PRV
Single Seal SAE
316 stainless steel
5 – 15 psi
15 – 25 psi
Our Single Seal SAE (SSS) is available in 316 stainless steel with a cracking pressure range set from 5-15 or 15-25 psi. There is no vacuum fill option for this configuration.
Selecting a SeaVent
SeaVents come in varying material options, sizes, and cracking pressure ranges to allow for a number of applications and installation options.
 Double Dual Seal |  Single Dual Seal |  Single Seal SAE | |
|---|---|---|---|
| Depth | Titanium: 11,000 m PEEK: 6,000 m | Titanium: 11,000 m Aluminum and Stainless Steel: 6,000 m | Stainless Steel: 6,000 m |
| Material | Titanium 6AI-4V PEEK | Titanium 6AI-4V Aluminum 6061 Stainless Steel 316 (passivated) | Stainless Steel 316 (passivated) |
| Default Cracking Pressure | 10 psi +/- 20% | 10 psi +/- 20% | 25 psi +/- 20% |
| Cracking Pressure Range | 5 to 10 psi | 5 to 15 psi (Optional 15 to 25 psi) | 15 to 25 psi (Optional 5 to 15 psi) |
| Diameter | 18.9 mm (0.75 in) | 20.6 mm (0.81 in) | 14.3 mm (0.56 in) |
SeaVent™ Relief Valve FAQs
What is the difference between the Single Seal and Double Dual Seal (DDS) models?
Single Seal: Standard reliable protection for general applications.
Double Dual Seal (DDS): Offers redundant protection using dual O-rings. This “true dual seal” design minimizes vulnerability to leaks and provides an extra layer of safety for high-value electronics.
Can I adjust the pressure at which the valve opens?
Yes, the SeaVent™ line includes models with adjustable cracking pressure ranges (e.g., 5–15 psi or 15–25 psi), allowing engineers to customize the relief point based on the specific enclosure requirements.
Do these valves support vacuum testing?
Yes, SeaVent valves are compatible with vacuum fill attachments, allowing operators to pull a vacuum on the housing to test seal integrity before deployment.