Edgewater Networks 240IS, Owner'S Manual

Page: 95 / 219

6-4
Selection Guide
Helm Options Four helms are offered in 3 displacements, as noted in the char t at right.
The H-21 helm has a 1" straight wheel shaft; H-25 has a 3/4" tapered
shaft. The H-42 and H-41 helms both have a 1" straight wheel shaft.
Tubing/Hose Options Use soft refrigeration type copper tubing for optimum per formance. For
tube-to-cylinder flex hoses, select a hydraulic hose rated for 1000 PSI (70
bar) working pressure, and with a ver y low volumetric expansion rating.
Cylinder Options
Cylinders are made from brass & stainless steel. Available with stainless rod
& ball joint (TMB models) or stainless rod & bronze clevis (TMC models.)
Cylinders with ball joints have 2-axis ar ticulation.
The K-31 is an optional pivot mount cylinder which can be used in the systems
numbered "8a" and "8b" on the opposite page. With this cylinder, the number
of wheel turns becomes 6.4 (using the H-42 helm) or 4.6 (H-41 helm).
The application guide on page 6-3 should be used with discretion. The
char t is only a guide to selecting a steering system. A steering system
manufacturer cannot anticipate all the variables in boat-rudder design
that affect the steering loads. It is the final responsibility of the boat
builder/designer to specify maximum expected steering loads. If the
required information is not available, please see the Displacement and
Planning Hull data sheets on page 10-21 and page 10-22. These
sheets after being completely filled out can be faxed to Teleflex
Technical Suppor t at 604-279-2202.
NOTICE
HELM PART# DISPLACEMENT RANGE RELIEF VALVE SETTING
H-21 2.75 cu.in. 950 psi (66Bar)
H-25 2.75 cu.in. 950 psi (66Bar)
H-42 4.00 cu.in. 950 psi (66Bar)
H-41 5.50 cu.in. 950 psi (66Bar)
DISTANCE—CYLINDER TO FURTHEST HELM
HELM TYPE 40 FEET OR LESS MORE THAN 40 FEET
All 1/2" O.D. Copper Tubing 5/8" O.D. Copper Tubing
MODEL PART# DESCRIPTION / MODEL / ROD END CONFIG
7" Stroke: HC5350 Cylinder BA175-7TMB (Rod End Ball Joint)
HC5356 Cylinder BA175-7TMC (Rod End Clevis)
HC5351 Cylinder BA200-7TMB (Rod End Ball Joint)
HC5357 Cylinder BA200-7TMC (Rod End Clevis)
9.5" Stroke: K-8 Hynautic Cylinder, 2.5" (Rod End Ball Joint)
11" Stroke: HC5378 Cylinder BA200-11TMB (Rod End Ball Joint)
HC5379 Cylinder BA200-11TMC (Rod End Ball Clevis)
3-LINE INBOARD STEERING