About Murray Corporation

Founded over 90 years ago, Murray Corporation continues to design and manufacture fasteners and clamps for hose and pipe applications in the worldwide agriculture, automotive, truck, off highway, municipal, marine, irrigation, beverage, and plumbing markets. Hose clamps are our specialty. Our manufacturing facilities are located in North America and China.

General Clamp Information

General Features
• Band and housing are stainless steel, regardless of the screw type ordered.
• Welded Construction is used in all Murray premium grade full size clamps. Four electronically controlled spot welds permanently join the housing to the band. The result is an assembly that efficiently translates the installation torque to sealing power. Welded construction also means no tabs or interlocked pieces that may invite crevice corrosion.
• Hex head screws with screwdriver slot are either 5/16” hex (Type F clamps) or 1/4” hex (Type I and M clamps). Screws are available in heat treated carbon steel, that is double plated with zinc plus trivalent chromate, heat treated 400 series stainless steel, 300 series stainless steel, or in 316 stainless steel.
• Murray Engineers are continuously searching for more cost effective clamping solutions for our customers’ applications. New designs and constructions are evaluated and introduced as the need arises.

"Gold Seal" Worm Gear Clamp

Heavy Duty "Seamless" Clamp

Engineering and design of custom clamps for specialized applications
are available from our in-house Engineering Department.

Our 1/2” Wide Band vs. Our Competitors' 9/16” Wide Band Design

Will a 9/16” wide band clamp seal better than a 1/2" wide band clamp?
No. Assuming equal clamp efficiencies and equal application torques, the sealing pressure exerted by a 9/16” band clamp will be lower than that generated by a 1/2 ” band clamp, because the sealing force is concentrated over a larger area.

What does actual test data show about the sealing effectiveness of 1/2” wide vs. 9/16” wide band clamps?
Comparison of Murray’s 1/2” wide band clamps to a competitors' 9/16” wide band clamps with mechanically attached housings show significantly less sealing power generated by the 9/16” wide band clamps. A significant portion of the tightening torque in mechanically attached housing clamps is consumed when the housing “seats itself” during tightening, leaving less tightening energy available to generate sealing power. In the Murray welding construction, the spot welds provide a rigid permanent joint between housing and band, allowing relatively more of the tightening force to be directed toward producing an effective seal.

Isn’t a 9/16” wide band clamp physically stronger than a 1/2” wide band clamp?
No. Three piece design 9/16” wide band clamps have a mechanically attached housing that fits into a large cutout in the band. Compared to the Murray welded design, the 9/16” wide band clamp may have as much as 65% less cross sectional material available in this critical housing-to-band joint area, which means less material to carry the load. The large band cut out in the mechanically attached clamp is the “weak link” in the design.

Does spot welding lead to corrosion?
No. Tests show that the spot welds in Murray clamps are no more susceptible to corrosion than the base stainless steel from which the clamps are made. Murray’s welded construction eliminates the tabs and interlocked feature that favor crevice corrosion in mechanically assembled clamps.