Cant figure out the valves on my vacuum casting machine : r

How to Check Valve Seats with a Vacuum Gauge

0391006 WATTS LF009M2QT 1-1/2 RPZ BACKFLOW PREVENTER

NVE - Vacuum Relief Setting

California Air Tools - The Largest Manufacture of Ultra Quiet, Oil-Free & Lightweight Air Compressors - Tips to Avoid Problems

Vacuum Chamber (315 ID x 310L, mm ) with Rocker Arm for DIY Induction Melting / Casting - HVC-Cast

85716 IPS W4702HA WATERTITE WMOB W/WATER HAMMER ARRESTORS PEX CONNECTION

Flow Control KTM Ball Valves - Valves and Controls

0556031 WATTS LFN36M1 3/4 VACUUM RELIEF VALVE #Q532527

Butterfly Valves: What Is It? How Is It Used? Types Of

Low Pressure Aluminum Casting