QHD Gear Pumps0 pages
Gear Pumps Catalogue
Basic Description
QHD
BASIC DESCRIPTION
QHD line pumps are particularly designed to be used in mobile hydraulic systems of agricultural, heavy construction
and road building machines as well as in advanced hydraulic systems of material handling devices. The geometric
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volume size range of this line is Vg = 10 to 100 cm /rev.
The pumps are characterized by simple construction with hydraulic pressure balance, compact dimensions and a wide
range of connection types. QHD pumps have a two-piece all-cast-iron construction. The basis consists of a supporting
body with a blind chamber for gear wheels and a fastening flange. The body as well as the flange are made of a highquality grey cast iron. In the body and the flange, sliding sleeves for gear wheels are molded. Gear wheels with 12
teeth made of heavy duty steel are optimized for low-noise applications. The axial balance of the pumps is
accomplished by means of aluminum alloy thrust plates, in the grooves of which compensating surface shape sealing
is positioned. For heavy duty with a weight-bearing drive shaft, the pumps can be equipped with front-end roller
bearings. QHD construction enables the pumps to be used already at low revolutions at high pressure.
QHD pumps have been produced in various designs with diverse drives, connecting flanges, fluid inlets and outlets.
They comply with the ISO, SAE, UNI as well as other worldwide standard and can be delivered in simple or multiple
designs. Furthermore, the pumps are also available in reversible version with internal or external drainage.
version 10/2011
Jihostroj a.s. Budějovická 148, 382 32 Velešín, Czech Republic e-mail: mailbox@jihostroj.cz, http: www.jihostroj.com
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