VOLVO Truck Air Brake Valve Oem 21707055 20451967 20512836 20561888 20741660 20994250 21379051 21991154 20837594 Solenoid Valve

Working Principle
What is Air Valve? Working Principles & Types – An air-operated valve, also known as a pneumatic valve, is a sort of power-operated pipe valve that works in the same way as a solenoid by using air pressure. As the air pressure rises, the compressed air pushes against the piston or diaphragm walls, causing the valve to open. The application determines whether the valve opens or shuts.
These valves are used for a variety of purposes in pneumatic systems, however, they are most commonly utilized for one of two purposes. When a certain pressure is achieved, the first activates a section of the system. The second avoids harm by maintaining a consistent pressure or flow rate inside a system or releasing pressure when it rises too high.

Function
When the truck brakes, the air pressure enters the exhaust valve and closes the air in the exhaust pipe, which slows down the engine and the vehicle, thus playing a braking role
Service Nuopei Auto Parts’ business philosophy is simple : We aim to provide on unparalleled level service to our customers

How do we achieve this?
1.Quality Parts :We Only Suplly parts of highest quality
2.Dedicated Staff :Every Member of our staff is fully dedicated to delivering on customers’ expectations.
3.Technical Expertise : Years of Industry Experience, Combined with the state of the art technology,allows us to identity customers’parts requirements, even from just a vehicle chassis number.
4.Delivery Service .Nuopei offers 7 days carrier service across the world
5.After Sales Service : Our Commitment to the customer does not end with a sale,Customer Satisfaction is of paramount importance before, during and after every transaction”

Advantage
Stable Quality, Favorable Price,Professional sales consultant ,24 hour Online Customer Service

1,Are you a manufacture or Traning company?
We are manufacturer and trading company of auto parts,We have been in this line for more than 12 years.
2,What kinds of parts can you supply?
We are committed to providing one-stop shopping services for European heavy trucks’user.(Especially on cooling system parts,suspension system parts,brake system parts,clutch parts,SCR post-processing system parts,electrical system parts and body parts.
3,What is your production Lead Time?
1 working day for stock;30 days for mass production.
Express Delivery
A full range of sea and air logistics system to provide you with the most convenient logistics experience,rapid response to save you time.
4.How about Quality and after Sell Service ? The Warranty is One Year , If there is any real quality problem , we will give refund or send new products as compensation
5.What is your package ?
Neutral Box or Customize According to Customer Requirement
6.Can I get One Sample ?
We can Provide Sample if customer willing to pay sample fee .
7.Do you test our goods before delivery ?
Yes We Have Tested 100% Before Delivery
8. What About Delivery Time ?
Ususally 7-14 days, if very big quantity need 35 days
9.Can you Produce According to samples ?
If quantity is ok we will develop according to your samples

Foshan Nuopai Import and Export Co., Ltd is a well-known professilal supplier in the field of commercial vehicle. Customer first is our company’s core value since 2004. Offering one-stop consulting and purchasing station of the most professional & best service is our target.There are three main business of our company: importing parts for local market, exporting parts for international market . We have a matured professional technician team that good at European brand trucks of SCANIA, VOLVO, BENZ, DAF, MAN ,IVECO , RENAULT and so on.We have established good cooperative relationships with customers from Europe, Middle East,South Asia, Southeast Asia, Africa and other countries/regions. Furthermore, our export business is still increasing rapidlly. Based on sincere faith, our company pays much attention on credibility and is willing to make friends with clients from all over the world.We aim to supply BETTER services for new and existing customers!