Build Fully Compliant AS 3814 Valve Trains
Stop manually cross-referencing complex tables and flowcharts. GasCalc's Valve Train Configurator instantly determines the exact Safety Shut-off Valve (SSOV), venting, and interlock requirements for your Type B appliance based on AS 3814:2018 standards.
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Core Capabilities & Audit-Ready Reporting
Navigate the complex decision trees of AS 3814 instantly and accurately.
SSOV Logic Automation
Automatically determines whether you need Class 1, Class 2, or Class 3 Safety Shut-off Valves based on burner input, gas type, and appliance classification.
Vent & VPS Assessment
Evaluates when atmospheric venting is permissible, or when a Valve Proving System (VPS) is legally mandated due to high capacity or heavy-than-air gases like LPG.
Pilot Interlock Logic
Determines the exact requirements for independent pilot take-offs and the required CPI/POC switch interlocks for safe start-up sequencing.
Data-Driven Compliance
Generates a complete, JSON-driven mathematical audit trail showing every formula, input, and conversion step.
Inspector-Ready Output
Outputs crisp, vector-based PDF reports directly from the field, providing Technical Regulators with the exact, unassailable mathematical proof required to certify Type B appliance ignition sequences.
How the Configurator Works
GasCalc guides you through the exact decision pathways dictated by AS 3814, removing ambiguity from valve train specification.
Define Inputs
Select your gas type (NG or LPG), the burner type (Atmospheric or Forced/Induced), and the burner's input rating in GJ/h or MJ/h.
Specify Pilot Setup
Indicate whether the system uses a start gas flame or pilot, which triggers secondary safety assessments for independent shut-off valves.
Get the Configuration
GasCalc instantly displays the precise valve arrangement required, mapping directly to AS 3814 Figures 2.1 through 2.4.
Legislative Framework
AS 3814:2018 Standards
Section 2 of AS 3814 explicitly defines the minimum acceptable arrangements for Safety Shut-off Systems to prevent unregulated gas flow into combustion chambers.
LPG Venting Hazards
Because heavier-than-air gases (like LPG) can pool in pits and drains, atmospheric block-and-bleed systems are often prohibited, forcing the use of Valve Proving Systems (VPS).
Auditor Submission
Generate a clean, unambiguous PDF report detailing the exact AS 3814 Figure arrangement your design utilizes, ready for instant Type B submission.
GasCalc transforms complex legislative tables into an error-free digital workflow.
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