For loads to 3,900 lb/hr (1769 kg/hr) . . .
Pressures to 600 psig (41 bar)
Continuous flow or on-off float drain traps
Armstrong’s line of fixed lever drain traps includes two basic models
available in cast iron and forged steel. The floats are light enough to
handle light liquids.
No. 21—A small, high-quality, economical drain trap
for use on drainage jobs where dirt and oil are not encountered. It
employs a single lever with a fixed pivot.
No. 21-312—Forged steel version of the No. 21, with larger float and higher leverage.
CAUTION: Ball float drain traps
are not recommended where heavy oil, sludge or considerable dirt are
encountered in lines. Under these circumstances, use Armstrong inverted
bucket BVSW traps.
For help in specifying the exact model you need, download the product literature.
- Ball Float Traps/Drainers – Installation and Maintenance (PDF)
- No. 21AR and No. 21-312 AR Air Vent – Installation and Maintenance (PDF)
- Series 21 & 71 Fixed Pivot & Snap Action Liquid Drainers – Installation and Maintenance (PDF)
- Series 21-312 & 71-315 Fixed Pivot & Snap Action Liquid Drainers – Installation and Maintenance (PDF)