4.3.4 Accessories

The following accessories are available for diaphragm pumps:

• Screw-in flanges and flange adapters
• Purge gas connection
• Fore-vacuum relay boxes
• Power supply packs for wall or standard rail mounting
• Cable for connection to turbopump drive

Figure 4.6: Operating principle of a screw pump

Figure 4.7: HeptaDry rotors