Scope: This standard specifies forged steel 20K globe valves used for shipboard steam, air, fuel oil, lubricating oil, fresh water, and feed water piping.

Pressure-Temperature Ratings:

• (Interpolation can be used for intermediate values.)

• Fluid Condition	Maximum Working Pressure (MPa)
  Steam at 400°C	2.2
  Steam at 350°C	2.6
  Steam at 300°C	2.9
  Steam below 220°C	3.1
  Air, Gas, Oil, and Pulsating Water	3.1
  Static Water below 120°C	3.4

Types and Nominal Sizes:

• Type	Connection Type	Nominal Sizes (DN)
  S Type	Screwed Ends	DN 6 and 10
  U Type	Union Ends	DN 6 and 10
  F Type	Flanged Ends	DN 15, 20, and 25

Inspection and Testing (per JIS F 7400):

• Seat Water Pressure Test: 3.74 MPa

• Body Water Pressure Test: 5.10 MPa

Material Specifications:

• Component	Material Specification
  Body	JIS G 3201 (SF440A) or JIS G 4051 (S25C)
  Bonnet	JIS G 3201 (SF440A), JIS G 4051 (S25C), or JIS G 5101 (SC480)
  Yoke	JIS G 3201 (SF440A), JIS G 4051 (S25C), or JIS G 5101 (SC480)
  Stem	JIS G 4303 (SUS403)
  Disc	JIS G 4303 (SUS420J1)
  Gasket	Per JIS F 7102
  Bolts/Studs	JIS G 4107 (SNB7)
  Nuts	JIS G 4051 (S25C)
  Handwheel	JIS G 5501 (FC200)
  Washer	JIS G 4303 (SUS304)

Connection Standards:

• Threads per JIS B 0205 (Metric coarse threads) and JIS B 0207 (Metric fine threads)

• Flanges per JIS B 2210 (Cast steel pipe flanges)