Search This Supplers Products:lpg cylinderscomposite lpg cylindergas bottlesteel gas cylinderscamping gas cylinderslpg gas cylinders
US $0.335,220 - 40,000 piece
US $0.2740,001 - 999,999 piece
Paramtents
Type Other
Material Other
Frame Material Stainless Steel
character metal
Packging & Delivery
Min Order5220 piece
Briefing
Detailed
Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position,[1] and then machining a conical-section surface into the valve seat that will mate with a corresponding conical-section of the corresponding valve. Generally two conical-section surfaces, one with a wider cone angle and one with a narrower cone-angle, are machined above and below the actual mating surface, to form the mating surface to the proper width (called "narrowing" the seat), and to enable it to be properly located with respect to the (wider) mating surface of the valve, so as to provide good sealing and heat transfer, when the valve is closed, and to provide good gas-flow characteristics through the valve, when it is opened.
网络文化经营许可证:浙网文[2013]0268-027号|增值电信业务经营许可证:浙B2-20080224-1 2007-2024 Tradevv.com. All rights reserved.