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IS 9338:1984 is the Indian Standard (BIS) for cast iron screw-down stop valves and stop and check valves for water works purposes. This standard specifies the requirements for materials, dimensions, construction, and testing of cast iron screw-down stop valves and stop and check valves. These valves, in nominal sizes from 40 to 300 mm and two pressure classes, are intended for use in water works pipelines.
cast iron screw-down stop valves and stop and check valves for water works purposes
Overview
Status
Current
Usage level
Specialized
Domain
Water Resources — Sanitary Appliances and Water Fittings
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
cast ironbronzegunmetalstainless steel
International Equivalents
Similar International Standards
BS 5152:1991BSI (British Standards Institution), UK
HighWithdrawn
Specification for cast iron globe and globe stop and check valves
Almost identical scope, covering cast iron globe and stop/check valves; IS 9338 is likely based on this standard.
BS EN 13789:2010CEN (European Committee for Standardization), Europe
HighCurrent
Industrial valves - Cast iron globe valves
Modern European equivalent covering the same valve type, material, and pressure ratings, but with a broader 'industrial' scope.
MSS SP-85-2019MSS (Manufacturers Standardization Society), USA
HighCurrent
Gray Iron Globe & Angle Valves, Flanged and Threaded Ends
Covers the same valve type (globe), material (gray iron), and end connections, but uses US Class pressure ratings and dimensions.
DIN 3356DIN (Deutsches Institut für Normung), Germany
MediumWithdrawn
Globe valves
A historic German standard for globe valves, covering cast iron but also other materials like steel for a wider range of industries.
Key Differences
≠Material specifications are based on national standards. IS 9338 specifies Indian grades like Cast Iron FG 200 (IS 210), while EN 13789 uses EN-GJL-250 and MSS SP-85 uses ASTM A126 Class B.
≠Face-to-face dimensions are not interchangeable. IS 9338 refers to IS 780, whereas EN 13789 refers to EN 558, and MSS SP-85 refers to ASME B16.10, leading to different valve lengths for the same nominal size.
≠Pressure rating systems differ. IS 9338 uses PN 1.0 and PN 1.6 in MPa, EN 13789 uses a wider range of PN ratings in bar (PN10, PN16, PN25), and MSS SP-85 uses the American Class system (e.g., Class 125).
≠Scope of application in IS 9338 is specific to 'water works purposes', which can imply stricter requirements for coatings or materials in contact with potable water compared to the broader 'industrial' scope of EN 13789.
Key Similarities
≈All standards cover the same fundamental valve design: a screw-down, rising or non-rising stem, globe-pattern valve for shut-off duty.
≈The primary material for the body and bonnet is cast iron (or gray iron), reflecting the suitability of this material for low-pressure water and general services.
≈Flanged end connections are a primary configuration in all mentioned standards, designed for integration into bolted pipe systems.
≈The use of bronze or other copper alloys for trim components (stem, seat rings, disc rings) is a common design feature across all standards to ensure durability and prevent corrosion.
≈The hydrostatic shell test pressure requirement is consistently 1.5 times the nominal pressure (PN) rating in both IS 9338 and EN 13789, indicating a similar approach to safety factors for the pressure-containing body.
Parameter Comparison
Parameter
IS Value
International
Source
Nominal Pressure Rating (Higher)
PN 1.6 (1.6 MPa)
PN 16 (16 bar / 1.6 MPa)
BS EN 13789:2010
Nominal Size Range
40 mm to 300 mm
DN 10 to DN 600
BS EN 13789:2010
Body Material Grade (Example)
Grey Cast Iron FG 200 (to IS 210)
Cast Iron EN-GJL-250 (to EN 1561)
BS EN 13789:2010
Trim Material (Example)
Leaded-Tin Bronze Grade LTB 2 (to IS 318)
Bronze CC491K (CuSn5Zn5Pb5-C) (to EN 1982)
BS EN 13789:2010
Hydrostatic Shell Test (for PN 16)
2.4 MPa
24 bar (2.4 MPa)
BS EN 13789:2010
Hydrostatic Seat Test (for PN 16)
1.76 MPa
17.6 bar (1.76 MPa)
BS EN 13789:2010
Face-to-Face Dimension Standard
IS 780:1984
EN 558
BS EN 13789:2010
Flange Drilling Standard
IS 1538
EN 1092-2
BS EN 13789:2010
⚠ Verify details from original standards before use
Key Values8
Quick Reference Values
Nominal size range40 mm to 300 mm
Class 1 Max Working Pressure1.0 MPa
Class 2 Max Working Pressure1.6 MPa
Class 1 Body Hydrostatic Test Pressure2.1 MPa
Class 1 Seat Hydrostatic Test Pressure1.4 MPa
Class 2 Body Hydrostatic Test Pressure3.0 MPa
Class 2 Seat Hydrostatic Test Pressure2.0 MPa
Minimum Cast Iron Grade for BodyFG 200 of IS 210
Tables & Referenced Sections
Key Tables
Table 1 - Principal Dimensions of Stop Valves and Stop and Check Valves