Industrial Jewels Pvt. Ltd. Offers Check Valve with Ball and Matching Seat. Industrial Jewels Pvt. Ltd. Is certified with ISO 9001:2000 quality system standard. These Check Valves with Ball and Matching Seat are used as medical devices and in analytical industries. Matching point of contacts ensure proper sealing. C Check Valve with Ball and Matching Seat is used for micro dispensing pumps [HPLC] injection devices and for other dispensing equipments. These products are used in liquid chromatography, medical & diagnostic instruments.