ISO3669 316L 4.50" (114mm) Rotatable Bolted Knife-Edge Flange

• Standard: ANSI, DIN, GB, JIS, GOST, ANSI
• Type: Welding Flange, Threaded Connection Flange
• Material: Carbon Steel, Stainless Steel
• Structure: Round, Flanges
• Connection: Welding, Screws
• Sealing Surface: RF, FF
• Manufacturing Way: Forging, Forging
• Size: 1/2"-4"(DN15-DN100)
• Rating: 150lbs~2500lbs
• Transport Package: in Wooden Box or Pallet
• Specification: ASTM/ANSI/GB/HG
• Trademark: kingmetal
• Origin: China
• HS Code: 73072100
• Production Capacity: 50000

Product Description

ISO3669 316L 4.50" (114mm) Rotatable Bolted Knife-edge Flange

The CF (ConFlat) flange is the most widely used for high vacuum and UHV applications. Many gauges, instruments, accessories and feedthroughs are available on this flange system.

The seal mechanism is a knife-edge that is machined below the flange's flat surface. As the bolts of a flange-pair are tightened, the knife-edges make annular grooves on each side of a soft metal gasket. The extruded metal fills all the machining marks and surface defects in the flange, yielding a leak-tight seal. The CF seal operates from 760 torr (10³ mbar) to < 1 x 10^-13 Torr (< 1.3 x 10^-13 mbar), and within the temperature range -196° C to 450° C (depending on material). Flange sizes in North America are normally referenced by their outside diameter (O.D.). However, in Europe and much of Asia, the nominal internal diameter (nominal I.D.) of the largest tube that can be welded to a bored flange is usually referenced in their nomenclature.

ConFlat flanges are offered in four versions:

• Fixed flange: is a one piece design where the bolt-hole orientation is fixed with respect to that fitting.
• Rotatable flange: is comprised of two parts, an inner weld ring and outer bolt ring. This enables the bolt ring to rotate about the inner weld ring.

Both Fixed and Rotatable flanges are available with your choice of through (clearance) holes or tapped holes.

Available sizes: 11/3" ("mini"), 23/4", 41/2", 6", 8", 10", 12", 131/4", 14" and 161/2" O.D

Specification

Material                                             

• Flanges               304ss (1.4301) or 316EFR (1.4429 ESU)

• Gaskets                OFE Copper

• Bolts                  300 stainless steel and 300ss silver Plated

Fastening

• Bolt type              Hexagonal or 12-point head

• Nut type              Hexagonal or two-hole plate nuts

• Size                  .312-24 UNF or M8

• Torque                  15 lb-ft or 20 Nm

Vacuum Range                 1x10^-13 Torr or below 10^-13 mbar

Features

• Complies with ISO 3669

• UHV rated to 1x10^-13 Torr mbar

• High temperature rated to 450°C

• Rotatable and non-rotatable geometries

• OFE Copper or optional Fluorocarbon-based fluoroelastomer (FKM / FPM) elastomer gaskets

• Tapped or clearance bolt holes

• Compatible with other manufacturers' Conflat® knife-edge flanges