To change the text size, hold down the Ctrl/Cmd key and press + to enlarge or - to reduce

Sitemap LinkedIn
- Improving well performance and integrity

Surface Annular Systems


New call-to-action


Sales & Customer Service

Master Surface Annulus Safety Valve (MSAS)

MSAS (Actuator and the SAS valve)
MSAS - Master Surface Annular Safety Valve
MSAS-G (Integrated in API gate valve)
MSAS-G (Integrated in API gate valve)



Gas lifted, gas vented or wells with sustained annulus pressure pose a considerable risk to personnel and facilities. In these applications annulus gate valves and ring gaskets are the primary well barrier. Gate valves provide only a single barrier, which can be breached upon impact or collision.


Regulatory and/or company requirements may demand mitigation for the associated risks.



The MSASTM, provides an additional independent barrier in the wellhead VR profile. The MSASTM is hydraulically operated and connected to ESD.

New call-to-action

Make inquiry