Double eccentric Butterfly valves (HB series)

This valve has a stable sealing property due to its unique sheet shape and material, and can be closed by both forward flow and reverse flow with a RPTFE seat ring to accommodate a variety of fluids.

Specification

Valve nominal size SHB 50A~300A
UHB 40A~300A
Applicable flange 5UHB JIS 5K
10SHB・10UHB JIS 10K
16SHB・20UHB JIS16K, JIS20K
150SHB・150UHB ASME Class 150
Maximum allowable pressure 5UHB 0.7MPa
10SHB・10UHB 1.4MPa
16SHB・20UHB 2.0MPa
150SHB 1.72MPa
160SHB 1.9MPa
Service temperature range SHB -10~+200℃
UHB -29~+200℃
Face-to-face dimensions JIS B 2002 46 series
Flow direction Bidirectional flow*
Applicable gaskets
(commercially available gaskets)
Joint seats (Minimum thickness 1.5 mm)
Spiral wound gaskets / Envelope gaskets
Automatic valves Contact KITZ Corporation for details.

*Recommended flow direction: Flow Pressure from the retainer side

Standard Materials

Parts Material
SHB UHB
Body FCD450-10 SUS13A/A351 Gr.CF8
Stem SUS420J2 SUS304N2
Disc SUS13A+Cr plated
Gland SCS13A
Seat ring RPTFE(Carbon fiber-filled PTFE)
Seat retainer S45C SUS304
Stem bearing PTFE(Metal backed)
Gland packing PTFE
Gasket PTFE

Feature

RPTFE seat rings for various types of fluids

Chemical-resistant RPTFE is adopted as seat material, so that it can be used for fluids that cannot be handled with rubber seats. (See the table for  “Corrosion resistance level of materials of disc and seat against fluid” on page 4 of the catalog.)

Double eccentric structure for stable sealing performance

The double eccentric structure minimizes the contact between the disc and the seat during operation and provides stable sealing performance with less wear of the seats over a long period of time. (Fig.1)

Easy retightening of packing

Retightening of packing is possible without removing the operatin device. (Fig. 2)

Original seat configuration for high durability (patented)

Bidirectional frow

Applicable to both of the direct and reverse flow control, however, flow pressure from the retainer side is recommended.

Applicable to commercially-available pipe gaskets

Joint seats (minimum thickness 1.5mm), spiral wound gaskets and PTFE envelope gaskets conforming to  the applicable standards can be used.

Top flange dimensions according to ISO 5211

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