Special Safety Relief Valve Seat Grinder

• Pneumatic motor for grinding tool rotation and eccentric spindle movement with infinitely speed setting
• Infinitely adjustment of eccentric spindle movement, range 0 – 3 mm
• Grinding time adjustable by timer
• Grinding disk rotation clockwise while eccentric movement counter-clockwise
• Spring loaded drive spindle for precise working pressure adjustment
• Crosshatched grinding due to individually adjustable rotation speeds thus resulting in a perfect utilization of abrasives, absolute seat flatness and reproducible grinding results
• Mirror finish valve seat surfaces
• Because of the precise machine arm positioning to the seat centre, the pre-selection of working pressure, grinding time and abrasives there are no negative or indefinite influences involved (always
• possible while doing grinding manually).
• Working range: 3/8” – 12”  (10- 300 mm)
• Seat diameter: min. 10 mm (¾") max. (6") 150 mm (mounted to stand)
• Seat diameter: min. 100 mm (4") max. (12") 290 mm (with 3-jaw-chuck)
• Submerging depth: 350 mm (13 ¾")

Portable grinding and lapping machine for working on seats in safety (relief) valves and Valve disks applicable on site (when butt-welded) or in shop
- On site use: Machine mounted to cover flange using 3-jaw-chuck also for precise Centring
- In shop use: Machine arm to be mounted to machine stand. The valve housing of the valve disks is mounted on the machine stand. Capacity up to dia. 320 mm (12 ½"); Precise centring achieved on table; User optimised pneumatic machine arm lifting system resp. lowering