Ross Controls 1969A4001 HOZE-FUZE

The Ross Controls 1969A4001 HOZE-FUZE is a 1/2 in. hose‑size pneumatic safety device that automatically reduces air flow to minimize hose whip after a hose failure. After activation, a minimal pilot flow escapes to atmosphere and remains until the air supply is shut off to reset, making it suitable for lines where a quick, controlled response is preferred over a full stop. This model is designed for non‑corrosive, non‑flammable, non‑hazardous gases. Porting options for 1969A4001 include 1/2 in. NPT male–female (the standard hose version) and BSPP versions designated with a D prefix (D1969A4001). The assembly features an aluminum body and a Hostalen piston, with a maximum operating pressure of 260 psi and a temperature range of -4° to 275°F (-20° to 135°C). While attached to a pneumatic circuit, the HOZE-FUZE provides a reduced downstream flow profile on hose‑line failure, helping contain hose whip without a total loss of airflow, and it resets simply by shutting off the air supply. Typical applications include automated pneumatic lines and manufacturing environments where hose whip presents a safety risk to personnel and equipment, especially in systems that require a quick re‑seat or re‑start after a fault. The 1969A4001 is a legacy Ross Controls safety device, with verified compatibility to standard 1/2 in. hose fittings and the documented flow characteristics published in Ross literature.