Definition -A Throat Bushing is a stationary bushing installed at the throat of a pump stuffing box around the shaft. Its purpose is to restrict fluid leakage, guide flush fluid toward the packing or seal area, and protect the shaft from wear. Throat bushings are commonly used in centrifugal pumps and other fluid-handling equipment.

As a leading international source, Sunmach delivers precision-engineered throat bushings machined from high-performance Stainless Steel and Nickel-based materials. Our production process matches customer-supplied schematics with extreme accuracy and ultra-tight tolerances. This specialized hardware is built specifically for mission-critical fluid handling systems.

We are an ISO 9001:2015 certified company, demonstrating our commitment to rigorous quality standards and consistent product excellence to deliver the best of the Nickel Alloys & Stainless Throat Bushing.

We make these Throat Bushing from a range of high-performance & exotic materials such as : Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205, Super Duplex S32750 to various Stainless Steel grades of SS 304L, SS 316L SS 310, SS 310H, SS 347H, etc followed by Special Stainless Steel Grades such as 904L Stainless Steel, UNS N08904, DIN EN1.4539 Nitronic® 50, Nitronic® 60, UNS S21800, DIN EN, 254 SMO, UNS S31254, DIN EN 1.454, Stainless Steel 410 & Stainless Steel 420 etc.

Sunmach’s extensive manufacturing capabilities and In-Stock Genuine & Authentic Raw Material availability allows us to support demanding industrial requirements with durable, corrosion-resistant, heat resistant & reliable Shafts made from Genuine Nickel Alloys and Stainless Steel Material, delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.