The OS&Y arrangement raises or lowers the stem as the gate is opened or closed. Allow clearance for the full stem travel and access to the handwheel and packing. The catalogue lists SCS13, SCS14 and SCPH2 as material options; specify the actual grade and confirm it on the supply documents. Do not treat these options as one material or infer an exact ASTM/AISI equivalent without the applicable material requirements.

Keep the JIS requirements separate

JIS B 2071 concerns steel valves; JIS B 2002 concerns valve face-to-face dimensions; JIS B 2220 concerns steel pipe flanges; JIS B 2003 concerns general valve inspection. These are different requirements, not interchangeable labels. Confirm the applicable edition, dimensional series, flange facing and test acceptance in the order and drawing. Their mention here is not a certificate of this product or a complete compliance declaration.

Check duty and replacement dimensions

State whether the valve is intended for isolation and identify any throttling request for separate review. Supply the nominal size, pressure designation, operating temperature and pressure, medium, facing, bolt pattern and face-to-face dimension. A JIS 10K label alone does not establish interchangeability with a PN or ASME Class flange or the allowable pressure of the complete assembly at every temperature.

Confirm the supplied construction

Seat facing, hardfacing, stem treatment, packing and operating mechanism must be verified for the ordered configuration. The product name does not prove cobalt-alloy overlay, nitriding, double sealing or an automated operator. Ask for the offered drawing, material schedule and test scope rather than assuming every optional construction is included.

Frequently asked questions

Can I replace a PN or Class valve simply because it is also called 10K?

No. Match the actual flange standard, facing, drilling, face-to-face dimension and pressure-temperature requirements of the complete joint. Do not use the designation as a numerical conversion.

How much room is needed above the handwheel?

Obtain the full-open overall height and stem travel from the offered drawing, then check the installation and maintenance envelope. No clearance value is assigned without the selected size and construction.

Are hardfaced seats and a nitrided stem included as standard?

They are not established by the catalogue title. Ask for the ordered material and treatment schedule and agree any hardfacing, stem treatment and test requirements in the quotation.

General technical references—not product certificates: Japan Valve Manufacturers Association JIS scope list · JIS B 2220 steel pipe flanges

Prepare a quotation for this valve

Confirm the exact JIS interface, rising-stem space and ordered construction before replacing or buying a gate valve.

Service conditions: State medium, working and design temperature/pressure, nominal size, quantity and isolation duty. Identify special medium cleanliness or compatibility requirements.
Flange and length: For replacement, provide the flange standard and edition, facing, drilling and face-to-face dimensions. A dimensioned drawing and nameplate photo help match the JIS 10K interface to the existing pipework.
Stem and operator space: Show available full-open height, handwheel access and maintenance route. Ask for the full-stroke drawing and confirm the supplied manual or other separately agreed operator.
Material and test agreement: Specify body/trim grades and any hardfacing, stem treatment, packing, inspection or traceability requirement. Confirm the actual construction and document scope in the offer.

Documents to agree before supply

Ordered outline and full-open height drawing with flange and face-to-face dimensions
Material schedule identifying body, trim and any agreed surface treatment
Applicable standards/editions and agreed inspection and pressure/sealing acceptance

Ask which documents are available for the offered configuration and agree their scope before supply. A catalogue picture is not a certified drawing or test report.