The ATM HS-1 is a shelter hatch designed for use in protected spaces. According to the product information provided by Shelter Shop, the hatch is designed to meet and, in some parameters, exceed the Finnish norms for S1 shelters. The ATM HS-1 combines blast resistance with gas-tight sealing and is designed with an inward-opening configuration. Its construction and locking system are intended for installation in shelter structures requiring protection against blast-wave pressu

Modern civil defence shelters, bunkers and protected facilities require ventilation systems that maintain normal airflow while automatically protecting the protected space during a blast event. The BVNO 2900 Blast Valve is a normally open, double-action blast valve designed to automatically close under blast wave pressure, protecting the interior against both the positive and negative phases of a blast wave. According to the manufacturer, the valve is intended for ventilation

The SU-III RWRT is a top-opening blast and gastight shelter hatch designed for protected facilities and civil defence shelters. According to the published product description, the hatch is designed for blast pressure of up to 440 kPa (4.4 bar) and is intended for horizontal, top-opening installation. Atmas Group The product is available with different clear opening dimensions and can be installed either during new construction or as a retrofit solution. SU-III RWRT — product

The DPG-A Differential Pressure Gauge is a mechanical instrument designed to measure and monitor differential pressure in protected shelter environments. According to the product description, the gauge is intended for monitoring the pressure difference between shelter compartments, such as the main shelter chamber and an airlock, as well as between a protected area and the outside environment. DPG-A Differential Pressure Gauge — Shelter Shop Differential pressure monitoring i