The LoKr DuoTM two-piece safety cartridge provides the proven advantages of the LoKr Safety Cartridge (best-in-class low KR, easy installation, and leak-tightness) in a two-piece, modular design.
Instead of a single welded cartridge that must be removed in its entirety after activation, the LoKr Duo separates into an outlet body and a welded inlet/rupture disc module. When the disc bursts, you simply replace the inlet module; the outlet body stays in line, saving time and reducing waste.
Key features and benefits
- Low KR for high flow, compact piping: The LoKr family is engineered around a best‑in‑class flow‑resistance factor (KR≈0.22), allowing engineers to achieve required relief flows without upsizing pipework. The LoKr Duo shares this low‑KR geometry, so plants can retain existing line sizes and still meet relief‑system sizing rules.
- Two‑piece cartridge design: The outlet body and inlet assembly are built to mate precisely. The inlet contains the disc and integral seal; once it bursts, you swap the inlet module. This reduces inventory costs and downtime compared with traditional three‑piece disc/holder/gasket systems.
- Hermetically sealed leak‑tight construction: The Lokr Duo’s inlet disc assembly is hermetically sealed and leak‑checked, reducing leak paths. It withstands full vacuum and is available for both gas and liquid service.
- Non‑torque‑sensitive installation: The integrated seal means there are no conflicting torque values between the holder and the disc. You simply torque the flange bolts to the gasket specifications; the disc is protected from damage and installation errors.
- Wide range of sizes and pressures: Standard sizes range from 1 in. to 10 in., with operating ratios up to 95% and burst tolerance of ±5%.
- High reliability and non‑fragmenting design: The reverse‑acting rupture disc provides consistent burst performance with high cycle life and won’t fragment when it opens. It is suitable for high‑cycling or pulsating applications.
Why choose the LoKr Duo?
The LoKr Duo is ideal for operators who need the leak‑free performance of a welded cartridge but want lower replacement costs and faster turnaround.
By replacing only the inlet module after each event, you minimize maintenance time and inventory while still benefitting from best‑in‑class flow, exceptional burst accuracy and environmental compliance.
The LoKr Duo is a versatile solution for processing applications where safety, reliability and leak‑tightness are paramount.