Zenith B Spécifications télécharger pdf (Page 7)

7

Installation

(continued)

2. Before starting, remove all flow

restrictions downstream of the pump

to allow initial operation with as low a

back pressure as possible.

3. Start the pump at the slowest speed pos-

sible and, if possible, with a lubricating

fluid. Zenith B-9000 pumps must never be

run without a fluid. Watch the point of

discharge for evidence of fluid. If no

discharge is seen after a reasonable

length of time, shut down the pump

and check for obstructions in the sys-

tem and proper pump rotation. The

term “sufficient length of time” is sub-

jective, and cannot be quantified

because of differences in installation.

If, for example, a connection can be

broken within a few inches of the

pump outlet port, the flow would be

evident with several seconds. If the

distance between the pump outlet

and the point of final discharge is

long, more time would be needed

before flow is confirmed.

Note: The pump will discharge a cloud of

bubbles when it is started, but this

will subside when the air is purged

from the pump. This is a normal

part of pump startup.

4. When satisfactory operation is

achieved, the pump and system can

gradually be brought up to normal

operating speed and pressure.

4. Listen for any sounds of distress

when first starting the pump and turn

the pump off immediately if any are

heard. Investigate for causes of

distress.

5. If, at any time during operation, the

pump does not appear to be running

smoothly, stop the pump immediately

to avoid serious internal damage.

Cleaning,

Inspection

and Repair

Remember: Zenith metering pumps are

made for exact duty. In order to develop

high pressure and minimize slip, the

clearance between the metering gears

and their housing must be as small as

possible, yet large enough to allow ade-

quate lubrication. All parts are machined

to extreme accuracy. Critical dimensions

are held between one and two ten-

thousandths of an inch (.0001"/.0002").

Accurate performance is dependent

upon proper handling. Please handle

the pumps with extreme care, and if pos-

sible, set aside a separate clean area for

pump maintenance and repair.

It is recommended that pump users

institute a program for dimensional

inspection of critical parts in order to

keep maintenance and operating costs

to a minimum. By noting the performance

of a pump immediately before removing

it from service and correlating the per-

formance to measured component wear,

the maximum limit for the pump’s critical

components can be established.

Additionally, the service life of the pump

can be predicted and downtime can be

scheduled accordingly.

If necessary, any Zenith precision

metering pump requiring maintenance can

be returned to the factory for complete

repair and overhaul. For a large number

of pumps, Zenith offers a contract repair

service which helps to reduce repair

costs and delivery time. Zenith Pumps

also offers pump maintenance seminars.

For more information concerning Zenith

pump repair services, please contact our

Customer Service Department.

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