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Elevance® Chair Hydraulic Valve Assembly Information and Theory of Operation

Elevance® Chair Hydraulic Valve Assembly Information

The Throttle Valves have been set by the factory and normally will not require adjustments.

Throttle Valve Settings

Number of Turns Open from the Fully Closed position
Component	Throttle Valve	Chair Only	Chair w/ L/R or Console
Base	TV1 Base Up	3 Full turns	5 1/2 Full turns
	TV2 Base Down	3 1/4 Full turns	2 3/4 Full turns
	TV5 Base Damper	3 Full turns	4 1/2 Full turns
Back	TV3 Back Up	2 1/2 Full turns	2 1/2 Full turns
	TV4 Back Down	5 1/2 Full turns	5 1/2 Full turns
	TV6 Back Damper	5 Full turns	5 Full turns

Hydraulic Valve Names and Functions

Name	Label	Design Function of the Valve
Pressure Relief Valve	PRV	Opens, returning hydraulic fluid directly to reservoir, if pressure in hydraulic system exceeds maximum allowable limit. Preset at factory, do not change.
Dampers	Base TV5	Acts as hydraulic cushions when raising or lowering base or back for a smooth stop and start. ADJUSTED AT THE FACTORY, should not require adjustments.
Dampers	Back TV6
Check Valves	CV1 Base	Prevents hydraulic fluid from going back in to the discharge side of hydraulic pump during Base Down or Back Down functions.
Check Valves	CV2 Back
Base Throttle Valves	TV1 TV2 TV5	Sets the speed of Base Up (TV1), Base Down (TV2) or both (TV5) functions.
Back Throttle Valves	TV3 TV4 TV6	Sets the speed of Back Up (TV3), Back Down (TV4) or both (TV6) functions.
Base Solenoid Valves	SV1 SV2	Electrically operated valves that are normally closed until power is applied to solenoid. SV1 opens to raise chair from Base. SV2 opens to lower chair to Base
Back Solenoid	Valves SV3 SV4	Electrically operated valves that are normally closed until power is applied to solenoid. SV3 opens to raise Back. SV4 opens to lower Back.