UGSI Encore 700, Руководство по эксплуатации и обслуживанию

Страница: 46 / 125

CF.440.400.001.IM.0417
ENCORE
®
700 METERING PUMP
30
3.6.4 Liquid Ends
NOTE: Refer to the List of Contents for Section 5 - Illustrations to identify
the applicable drawings.
The Encore® 700 metering pump off ers six diff erent sizes of liquid ends to
provide a wide range of capacities and pressures. The simplex arrangement has
a capacity up to 317 gph and pressure up to 175 psi. PTFE-faced diaphragms are
used as pumping diaphragms to provide metering accuracy as well as chemical
compatibility. Six sizes of PTFE-faced diaphragms are available: 1-3/8", 2", 3",
4", 5", and 6-1/2". A variable eccentric mechanism is mechanically connected
to the PTFE-faced diaphragm by a crosshead. A secondary seal mounted on
the crosshead isolates the gearbox from the liquid end. Table 1.3 (in Section
1) provides further details on capacity and pressure capabilities for each liquid
end. Cartridge valves are used on all the liquid ends to provide ease of service
and fi eld maintenance. Clear valve housings assist in checking the valve per-
formance, providing built-in sight fl ow indication (except for the 6-1/2" head).