DN50 20100D with flanges

Model 20100D is a 3-way TCV with flanges in diameter DN50. Model 20100D has a lower pressure drop compared to model B in DN50. arameter Value Code Leak Hole Diameter. Maximum Pressure 10 Barg, flow Coefficient Kv 85. Flow Coefficient Cv 98. Weight (approximate) 20 kg.

The TCV is a direct-acting, internal-sensing, self-actuated 2- or 3-way temperature control valve. The regulation takes place automatically as a result of the temperature of the liquid flowing through the valve.

Before starting installation 

• Upon receipt, the valve should be checked for damage sustained in shipping. All AMOT valves have nameplates attached, which are stamped with the valve model number and serial number. 
• Before installation, ensure that the valve is suitable for the purpose, checking temperature, pressure and material parameters, and any special approval requirements. Check that the intended pipe fittings are suitable for the application. 
• Check that the valve size has been selected in accordance with the anticipated flow rate through the valve. To maintain good temperature regulation the pressure drop across the valve should be in the 0.14 to 0.5 bar (2 to 7 psi) range. 
• If the valve is to be fitted at a high point in the system, the system should be vented to prevent trapped air around the temperature elements. 
• For optimum temperature regulation the system should be designed so that the element is in the mid-position under nominal conditions. To achieve this it may be necessary to balance the fluid flow by inserting an orifice in the by-pass circuit. 

Mounting the valve to the pipe 

The valve may be mounted in any direction, but should be properly supported and not subjected to excessive bending. Ensure the pipe flange connections are correctly aligned to avoid stressing the valve body. For the main flanged ports bolting and gaskets should comply with the relevant standard. All relevant local regulations must also be observed. 

Start up 

• Upon installation and on start-up of the system, all parts of the circuit should be closely monitored to ensure correct performance. A system in which the valve has been properly selected for the anticipated flows should operate very closely to the valve’s nominal temp rating. 
• Water cooling systems will usually operate at or slightly below the nominal temp. Lubricating oils and most other higher viscosity fluids will operate at or slightly above the nominal temperature. 
• In any system where the indicated temperatures are more than 2.7°C (5°F) from the nominal temperature, then an effort should made to locate the cause. 
•  Any system operating at an indicated 5.5°C (10°F) or more from the nominal anticipated temperatures may well be malfunctioning and the cause should be located and rectified. 

Operation: The valve is fully automatic in operation and does not require user intervention to operate. 

Maintenance: The valve must be removed from the pipe system before any maintenance can be done to the valve. 

Dismantling the valve 

• Remove housing nuts (11) and split valve. Remove the lower housing (2) taking care not to damage the elements. Remove and discard housing gasket (3) ensuring any traces of the gasket are removed from the housing mating faces.  
• Simply pull the element from the upper housing. 
• Inspect valve seat for wear or damage. If required replace valve seat (5), remove by unscrewing capscrew (14).

Reassembling the valve 

• Lubricate gasket (3) liberally with a good grade of petroleum grease, allow to soak. 
• If valve seat changed, refit capscrew with Loctite 2400 locking compound (EJ). 
• Lightly grease and stretch new ‘O’ ring (7) and fit into upper housing (1). Position ‘O’ ring concentrically to assist element assembly. 
• Insert element into the upper housing taking care not to damage the ‘O’ ring. 
• Position lubricated gasket on upper housing joint face (1). Place lower housing (2) over upper housing, secure with nuts (11) and washers (10), use Loctite 2400 locking compound (EJ).

View datasheet for complete information