LM Series Pressure Manhole Covers by Knappco

Knappco pressure manhole covers are designed for a diverse range of industries and applications, with a wide array of different pressure and non-pressure configurations. Knappco pressure manholes can also be custom-designed to meet precise operational specifications. The LM Series handles many diverse commodities with working pressures up to 30 psi.

Request More Information

Features & Benefits

A full-opening, 20-inch pressure manhole for railcars up to 30 psi
Used in handling salt, cement, dry food products, sand chemicals, crude oil and other general applications with working pressures less than or equal to 30 psi
Features six quick-opening adjustable cam levers
Open-rib cover design provides strength without product hangup
Meets MC307 and DOT-407 (HM183) requirements

Models / Drawings

lm1110_20_manhole_assembly

Download PDF

Read in browser
lm1210_20_manhole_assembly

Download PDF

Read in browser
lm1310_20_manhole_assembly

Download PDF

Read in browser

Features

Features & Benefits

A full-opening, 20-inch pressure manhole for railcars up to 30 psi
Used in handling salt, cement, dry food products, sand chemicals, crude oil and other general applications with working pressures less than or equal to 30 psi
Features six quick-opening adjustable cam levers
Open-rib cover design provides strength without product hangup
Meets MC307 and DOT-407 (HM183) requirements

Models / Drawings