PC120-6 PC110-7 PC130-7 PC128 Main Relief Valve 709-90-52201 709-90-52203 709-90-52202

PC120-6 PC110-7 PC130-7 PC128 Main Relief Valve 709-90-52201 709-90-52203 709-90-52202

Features:
 

1. Pressure sensing: The main relief valve adjusts by sensing the working pressure of the hydraulic system. In the excavator hydraulic system, the main relief valve is usually connected to the outlet of the hydraulic pump or the high pressure side of the main circuit. When the pressure of the hydraulic system exceeds or reaches the set pressure threshold, the main relief valve begins to play a role.

2. Pressure balance: When the pressure of the hydraulic system exceeds the set pressure threshold, a balance is established between the pressure inside the main relief valve and the system pressure. At this time, the main relief valve adjusts the flow channel of the hydraulic system through the mechanism composed of the spool, spring and regulating device to control the working pressure of the system.

3. Overflow control: Once the pressure of the hydraulic system exceeds the set pressure threshold, the main relief valve will open the flow channel to allow excess hydraulic oil to flow back to the tank. This prevents the pressure of the system from being too high and protects the safety of hydraulic components and equipment. When the pressure of the hydraulic system is reduced below the set pressure threshold, the main relief valve will be closed again to maintain the stable working pressure of the system.

4. Pressure adjustment: The main relief valve usually has an adjustment device, and the operator can change the set pressure threshold by adjusting the parameters on the adjustment device, such as the spring preload force or the spool position. In this way, the working pressure of the hydraulic system can be adjusted and controlled according to the specific working requirements and conditions.

Product description

 Our main products:Hydraulic Pump,Engine Parts,Electric Parts,Chassis Parts,Excavator Bucket and Teeth,Radiator,Full Gasket Kit Series,Maintenance Parts.We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers.Sufficient inventor. No matter when you make order, we can ship goods as soon as possible.The best and more professional service and after-sales service.
 
 
 
PAYMENT POLICY:
We accept PayPal, VISA, MasterCard, Debit Card through PayPal.
 
SHIPPING POLICY:
Generally shipping can be made within 1 business day after the order is received.
 
RETURN POLICY:
We offer 14 days return policy after the buyer received the item. Item being returned must be in brand new condition, unused with the original parts and label included. The shipping expenses or any other related fees will be paid by the buyer. We do not accept returns if the item has been installed or has been damaged for some reasons.
 
LIABILITY:
The parts we provide are not original, it’s aftermarket replacement parts, we are only responsible for the parts we sold, we can accept return, refund or replacement if any problems on the parts, we do not compensate your labor, towing, repair, rental expenses or any other related expenses, please understand.
 
CONTACT US:
We have more than 20 years’ experience on excavator parts, except the items listed on ebay, we have various excavator parts available, you’re always welcome to contact us should you have inquiry or comments, we will try to reply you within 24 hours, thank you!
 
PLEASE MAKE SURE THAT YOU'RE ORDERING THE CORRECT PARTS FOR YOUR EXCAVATOR, IF YOU HAVE ANY DOUBT ON THE PARTS YOU’RE ORDERING, PLEASE PROVIDE US WITH DETAILED INFORMATION, THEN WE CAN VERIFY THE PARTS TO AVOID ANY WRONG PARTS AND RETURNS.
 
KIND REMINDER TO OUR DEAR CUSTOMERS: IF YOU’RE SATISFIED WITH THE QUALITY PLEASE GIVE US GOOD RATING AFTER YOU RECEIVE THE GOODS, PLEASE LET US KNOW IF YOU’RE NOT HAPPY WITH THE QUALITY AND WE WILL TRY OUR EFFORTS TO SATISFY YOU.