This quick-release pressure vessel clamp system is the most practical and widely used means of positively securing flanges on pressure vessels in processing plants. The clamps replace conventional swing bolts and typically provide substantial saving over stud bolts on any vessel or processing equipment requiring even occasional opening. A wide range of sizes and types are available, including special versions with limited swing, downward release, reversing swing, etc… The segmented screw clamp can be modified to fit your processing needs. SAVE TIME AND MONEY
  • REDUCE LABOR TIME IN HALF or less as compared with standard nut and bolt
  • NO DRILLED FLANGES – Closing force acts near vessel wall
  • LESS Material (Narrower & shallower flange section)
  • LESS Preparatory Work
  • LESS Machining (drilling, rolling, etc…)
  • FEWER closing screw clamps than standard nut and bolt
  • QUICKER RELEASE with fewer turns of each nut
  • SAFER – Eliminates dangers created by missing nuts and bolts

Product Description

Type D
Clamping Length (M) in(mm) 380 to 430
Length (L) in(mm) 655
Width (B) in(mm) 75
Dimensions A in(mm) 14
Dimensions B in(mm) 20
Dimensions C in(mm) 10
Dimensions D in(mm) 24
Dimensions E in(mm) 65
Dimensions F in(mm) 60
Dimensions G in(mm) 48
Dimensions H in(mm) 104
Dimensions I in(mm) 10
Dimensions K in(mm) 12
Dimensions L in(mm) 18
Dimensions M in(mm) 205
Dimensions N in(mm) 60
Weight (kg/st) 13.50
Typical Applications
  • Reactor Vessels
  • Pressure Vessels
  • Vacuum Vessels
  • Pressurized Filter Housings Mix Vessels
  • Centrifuges
  • Manways

This unique screw clamping system is utilized for securing tank covers, manways, port holes, and flange openings without the necessity to drill and tap bolt holes into the flange surfaces, saving material and time in building and assembling these flanges. The clamps are available with ASME code certification.


Drop forged, without cracks and wrinkles. Surface is sandblasted. Certificate according to DIN EN10204 3.2 and ASME code.

Material Available
  • Type 5, steel CK35, Mat. no. 1.1181, ( 1035 Equivalent)
  • Type 8, steel 34Cr4, Mat. no. 1.7033, ( 5132 Equivalent)
  • Type W, steel 21CrMo V57, Mat. no. 1.7709, (4125 Equivalent)
  • Type B7, steel ASTM SA 193-B7 ( SA 193-B17 for larger clamp sizes) (4142 Equivalent)
  • Type A4, stainless steel, Mat. no. 1.4571, (316Ti Equivalent)
  • Type B8M, stainless steel ASTM 193-B8M, (316Ti Equivalent)
Material Finishes Available
  • Zinc plating
  • Pickling and passivating
  • Electro polishing
  • Veralit Plating
  • Hard chroming


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