Blast Valve 12

Blast Valve 12 adds blast protection and a build-your-own retractable bunker shelter for Kiloton. It now includes the solid Thermonuclear-Proof Block for bunker walls and shelters. Craft four with eight obsidian and one netherite ingot.

Build your shelter

• Dig a shaft to the size you want. A 3×3 opening can use a 3×3 platform and a 3-block drop.
• Fill the opening with connected Blast Lift Platform Tiles. Their rectangular footprint sets the platform size.
• Mount Kiloton radar, SAM launchers and other equipment on the platform. Place the Blast Shelter Controller on the rim, within 12 blocks horizontally.
• At roof level (platform level +4), place two banks of Horizontal Blast Doors on opposite sides of the opening. They slide across the hatch to seal it. For a 3×3 opening, use a 2×3 bank on one side and a 1×3 bank opposite it.

Right-click the controller to operate the platform manually. When active Kiloton radar detects a tracked missile predicted to arrive within five seconds and within 48 blocks of the platform, an armed Kiloton SAM can fire its configured shots for up to three seconds. If no SAM is armed, the platform lowers and the doors close immediately. If an armed SAM does not begin engaging within one second, the shelter also retracts. When it does engage, the platform and equipment remain available during the firing window, then lower no later than two seconds before the predicted impact. The two roof-door banks slide over the opening, and Kiloton controls interceptor ammunition and shot count.

The shelter remains closed through the predicted impact and for five seconds afterward, then restores the equipment and block entities. The Thermonuclear-Proof Block is marked indestructible in Kiloton's blast profile regardless of warhead yield, including fully loaded thermonuclear bombs. Closed Horizontal Blast Doors, Blast Valve 12, the controller and lift tiles receive the same protection. TNT, creepers and other vanilla explosions also trigger the shelter and close the blast valve; these blocks have very high vanilla explosion resistance.

Includes a separate Horizontal Blast Trapdoor for a single horizontal opening.

Requirements: Minecraft 1.21.1, NeoForge 21.1 and Kiloton 1.3.x. Install this add-on on both client and server.