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Our caliper brakes are made entirely of die cast silicone bronze with stainless steel hardware. The standard lining supplied is asbestos-free with a coefficient of friction between 0.45 and 0.55. All caliper brakes are available with shims between the shoe and the bearing to adapt to thinner discs. Most of our actuators are of the low-pressure type. The maximum pressure for fluid applied calipers (air or hydraulic) is 100 psi/0.7 MPa.

*Manufactured under the license from WPT Power Corporation. SJS is authorized for sales to oilfield customers in China.



From the Siberian tundra to the north China Sea to the Middle East, to Africa and all across the Americas, SERVA

is defining this century’s model of oil and gas production, onshore and offshore, with vision, innovation,

manufacturing and resources to serve the growing demands of progress and opportunity.