How To Install Various Components On The MDT Harvey Chemiclave Series


Following are several Service Tips that may assist you in the installation and servicing of the AllClaveParts Metering Valves that fit the MDT-Harvey (Barnstead Thermolyne) Chemiclave® Models E, 4000, 5000, 5500 and 6000.

When rotating the control shaft from the “Depressurized” position to the “Pressurized” position, or vice versa, a small amount of solution is forced out through the two vent holes in the outer body of the metering valve. This is a normal function of the valve. In fact, a splash shield accompanies every AllClaveParts valve and is designed to absorb the drips.

However, there are times you should be suspicious and here’s what to do. If the machine loses pressure, check the o-rings and tubing for cracks. Check for excessive bubbles in the fill tube. Then make sure that the operating temperature is below 275°F because the solution will start to boil away at 272°F. (Tip: If there are excessive bubbles in the fill tube, without a pressure leak, this means that the chamber temperature is too high.

Use the Max Register Thermometer to confirm that the temperature is too high and not a valve problem. If you see fluid being pushed through the vent line, check the valve o-rings. If the main reservoir is depleted long before it should be, check the valve o-rings.

As you can see, the o-rings are the key to maintaining a working valve. In fact, AllClaveParts Metering Valves come with a FREE lifetime availability of the Metering Valve Service Kit (Part #MDK057) that includes all of the orings and lubricant that you will need. Ask for Your FREE Kit (Part #MDK057) with any of the Metering Valves ( Part #MDV010, MDV011 or MDV016) the next time you place an order. That’s the AllClaveParts Advantage! widget logo