Name Filler material Basic Design with Outer Ring With Inner Ring

With Inner
/Our Ring

p_spiral_li01 p_spiral_li02 p_spiral_li03 p_spiral_li04
CLEANTIGHT Non-asbestos
inorganic paper
No.8590 No.8591 No.8592 No.8596
Lined CLEANTIGHT Non-asbestos inorganic paper VALQUAFOIL tape No.8590L No.8591L No.8592L No.8596L
BLACKTIGHT VALQUAFOIL tape No.6590 No.6591(1) No.6592 No.6596
WHITETIGHT VALFLON tape No.7590 No.7591(1) No.7592 No.7596
Mica filler products Mica tape No.M590 No.M591 No.M592 No.M596

Note (1) we recommend No.6596 and No.7596 (with inner/outer rings) because No.6591 and No.7591            (with outer ring) may cause abnormal deformation inside, depending on usage condition.

Gasket with partition bar for heat exchanger

—For ordering a product with the partition,    specify size and flat shape with “Y”.

(ex.) Valqua No.8590V-ZEZYZ

Non-circular gasket

—For ordering a non-circular product (oval,    ellipse, square, etc.), specify size and flat  shape with “E” (ex.) Valqua No.8590V-ZEZEZ

Gasket for nuclear power station

—For ordering a product for use where halogen use (AE-processed) ion or fat oil should be avoided, such as for a cooling system of a nuclear power station, specify “E”.(ex.)  Valqua No.6596V-EEEZE

Other information

Metal materials


SUS304 aluminium
SUS304L titanium
SUS316 nickel
SUS316L Monel metal
SUS321 SPCC (inner/outer ring only)


Applied standard

  • JIS B 2404
  • JPI-7S-41
  • ASME B16, 20

Related standard

  • JIS F 7102

Manufacturing Range                                   unit: mm

gasket thickness inside diameter
6.4 (W) 300~4000
4.5 (V) 10~3000
3.2 (T) 10~1500
1.6 (P) 10~150


Remark: Product of gasket thickness 1.6 mm is available only for the basic shape and SUS 316 loop.

Standard Size

Available usage range

  • For JIS pipe flanges
  • For JPI and ASME/ANSI pipe flanges

The manufacture range includes gaskets for standard pipe flanges per API, MSS, etc. and for equipment such as heat exchangers, pressure vessels, and valve bonnets.

Available usage range


Valqua No. Temperature range °C(1) Pressure limitation MPaokgf/co2p
8590 series -200~500 29.4o300p
8590L series -200~600 29.4o300p
6590 series -270~450 29.4o300p
7590 series -260~300 19.6o200p
M590 series -200~750 29.4o300p

Note (1) The temperature range above depends on the materials of hoop and inner/outer ring.