KINNEY KT VFP Series, Инструкция по установке, эксплуатации, обслуживанию и ремонту, Страница: 9 / 24

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MAINTENANCE
PERIODIC MAINTENANCE
There is no fixed interval for changing pump oil, since applications vary widely. This can be determined only by experience and/or
by deterioration of pump performance. As a minimum, the pump oil should be changed after each six month logged period of
operating.
At high pressures, or with a gas ballast flow the oil level should be higher than it is when operating at low pressures near blank off.
If there are no changes in the oil level, check for obstructed oil passages. Check the condition of the oil periodically by draining a
small quantity of oil into a clean container and visually inspecting it for solid or liquid contaminants. Clean strainer after oil pump
(KT-840VFP and KT-1350VFP).
OIL CONTAMINATION
When the pump has operated satisfactorily for some time and then gradually the vacuum becomes poor, clean the oil by applying
gas ballast, or change the oil as directed in the Changing the Oil section. A change in the color of the oil does not necessarily mean
that is not satisfactory for use. On the other hand, vapors may contaminate the oil and not show any color change.
The following factors may cause the pump oil to deteriorate:
• Water and solvents will lower viscosity
• Solid accumulation will increase viscosity and “feel gritty’
• Polymerization and chemical attack on oil will increase viscosity and odor
As a “Rule of Thumb” the oil should be changed if the oil “feels gritty” or:
• Viscosity changes more than 100 SSU at 100°F ( 38°C).
• Oil color becomes opaque
• Smells burnt or acrid smell occurs
• Total Acid Number increases to 0.3
If oil contamination is suspected, change the oil and operate the pump for 15 to 30 minutes. Repeat this procedure as required to
flush out all contaminants from the pump or operate the pump with gas ballast as explained under Gas Ballast. See gas ballast and
water handling instructions under OPERATION. Oil filtration systems are available for filtering solid, water, and acids continuously
or periodically.
CHANGING THE OIL
Run the pump until the oil reaches normal operating temperature 145 to 165°F, (63 to 75’C’ below 100 torr (130 mbar). Stop the
pump, place a container under the oil drain valve and open the valve until the oil is removed from the pump, then close the valve.
If the oil is being drained due to oil contamination it is advisable to drain the oil from the discharge valve well. The well is between the
pump cylinder and separator housing, the oil trapped there can be drained by removing the pipe plug(s) from the cylinder located
above the heads. On the KT-840VFP only, also remove the pipe plug level with the oil drain valve connection and near the left hand
corner of the cylinder when facing the drain valve.
When the oil has drained from the pump close all drains and fill the pump with the quantity and type of oil shown in the specifications.
The oil level will show above the center of the sight gauge until the pump is started and the oil is distributed through the pump.
LUBRICATING THE PUMP
The lubricating Gear Pump is mounted on the closed head and is driven directly by the vacuum pump shaft. Failure of the gear
pump may be detected by deteriorating performance, noise, unusually high temperature and lower temperature of oil line tubing.
The tubing should be nearly the same as the oil temperature or 145 to 165°F( 63 to 75°C).
The KT-1350VFP has an oil pressure gauge that should indicate at least 20 psig.(1.4 bar). The other pumps have a plug that may be
removed and a pressure gauge or switch added. Caution - these pumps do not have a bypass valve on the oil pump and pressure
may exceed 150 psig (10 bar) on cold start up.
STALLING
If the pump stalls at any time, it may be due to loose belts, lack of lubrication caused by failure of the oil circulating pump, badly
contaminated oil, coating build up or foreign matter in the pump or oil line strainer (KT-1350 and KT-840VFP). If the pump cannot be
turned over freely by hand after cooling, there is foreign matter in the pump and the inside of the pump must be cleaned. Sometimes