Heating Systems Safety Valves

Overview

Engineering reference data for Heating Systems Safety Valves in material science and properties.

Key Formulas

Stress

$\sigma = \frac{F}{A}$

Force per unit area.

Strain

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

Hooke's Law

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

Thermal Expansion

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Variables

Installation and Maintenance Guidelines

Safety valves should be removed at least once each year for inspection and cleaning of any deposits that might affect their operation. To eliminate the necessity of shutting the system down for the inspection, a three-way stop valve may be installed under 2 safety valves, each with the required relieving capacity, installed so that both safety valves cannot be closed off from the vaporizer at the same time.

Alternatively, 2 or more separate safety valves may be installed with individual shutoff valves. In this case, the shutoff valve stems must be mechanically interconnected in a manner that allows full required flow capacity at all times.

Safety Valve Capacity Sizing

References

• Original Source