Sluice Valve for Water Works Purposes (50 to 1200 mm Size)

IS 14846 - Scope Key Points & Tables Summary

Scope:
IS 14846 covers dimensions and specifications for sluice valves, primarily for nominal pressures PN 1.0 and PN 1.6.

Key Dimensions for Sluice Valves (PN 1.6) - Table 3 (mm)

Tolerances on Length 'A':

• Up to 300 mm: ±2 mm
• 300 to 600 mm: ±3 mm
• 600 to 800 mm: ±4 mm
• 800 to 1000 mm: ±5 mm
• Above 1000 mm: ±6 mm

Tolerances on square, a, X: ±0.5 mm
Tolerances on length of square, C: ±1.0 mm
Tolerances on size of hand wheel, D: ±5.0 mm

Flange Dimensions (Example for Nominal Size 50 & 65 mm)

IS 14846: Key Dimensions & Tolerances for Sluice Valves

1. Dimensions (mm) for Nominal Size 50 & 65 (Flanges) - Table 3A

2. Tolerances on Length 'A'

3. Other Tolerances

4. Dimensions of Body, Seat, and Wedge Facing Rings (Table 4)

IS 14846 - Materials: Key Dimensions & Specifications for Sluice Valves

Clause 7.7.1 mandates major dimensions of stems and wedge nuts per Tables 2, 3, 4 and related figures.

Key Tables Summary (Dimensions in mm):

Tolerances on Dimensions:

Notes:

• Packing size refers to diameter for round and side length for square packing.
• Alternate dimensions (ALT I, ALT II) exist but ALT II deleted after 2005.
• Manufacturer's design may apply for some large sizes.
• Dimensions vary with nominal pressure (PN 1.0, 1.6, etc.) as per Tables 2, 3, 4.

Visual Concept (Stem & Nut Dimensions):

graph LR

IS 14846 - Design & Construction Key Specifications

Major Dimensions (Clause 7.7.1)

• Dimensions of stems & wedge nuts per Tables 2, 3, 4.
• Refer to Figures 1A, 1B, 1C, 2A, 2B, 3A, 3B, 4, 5, 6 for geometry.

Tables Summary (All dimensions in mm)

Key Parameters in Tables:

• Length over Flanges (PD, ALT-I, ALT-II)
• Width (B max), Overall Height (H max)
• Stem: Diameter (d min), Length from Collar (L1), Collar Thickness (t)
• Stuffing Box: Inside Diameter (E), Packing Size, Number of Packings
• Cap: Size of Hand Wheel (D), Size of Bottom Square (X), Length of Square (Y)

Tolerances on Length (L or A)

Notes:

• Packing size is diameter (round) or side (square).
• Alternate II dimensions deleted after 01 April 2005.
• Manufacturer’s design applies for some large sizes.

Example: Stem Diameter & Length for PN 1.0, Size 100 mm

• Diameter (d min) = 27 mm
• Length from Collar (L1) = 240 mm
• Collar Thickness (t) = 8 mm

IS 14846 Key Specifications for Sluice Valve Components

1. Materials (Table 1)

2. Wedge Face Inclination (Clause 7.4.2)

• Wedge Face Inclination:

IS 14846: Guides, Lugs, Channel & Shoe Arrangements

1. Guides and Lugs (Clause 7.5)

• Guides and lugs guide the wedge through full travel.
• Manufacturer may provide guides on wedge & lugs on body or vice versa.
• For horizontal sluice valves, channel & shoe arrangement is optional as per purchaser.
• Channel & shoe liner thickness: min 5 mm for valves ≥ 450 mm.
• Channel & shoe secured by non-protruding rigid rivets of non-ferrous metal.

2. Clearance Between Guides and Lugs (Clause 7.5.1)

3. Channel and Shoe Arrangement (Clause 1.1.11: A-1.1.11)

• Used on guides and lugs for horizontal valves.
• Material specifications as per Table 1 (refer IS 14846 Table 1 for details).
• Ensures smooth sliding and wear resistance.

Summary Diagram of Guide-Lug with Channel & Shoe Arrangement

flowchart LR
    Wedge -->|Guided by| Guides
    Guides -->|Contact| ChannelShoe
    ChannelShoe -->|Attached by| Rivets[Non-protruding rivets]
    Lugs -->|Contact| ChannelShoe
    ChannelShoe -->|Lined with| Liner[Min 5 mm thickness for ≥450 mm valves]

For detailed dimensions of stems and wedge nuts, refer to Tables 2, 3, 4 and figures 1A to 6 in IS 14846.

IS 14846: Gears and Operation Mechanisms for Sluice Valves

Key Points from Clauses:

• Clause 7.10 (Gears):

  • Gears must follow IS 2535 for design and workmanship.
  • Gear ratio is calculated based on:
    • Maximum stem torque (T)
    • Hand wheel diameter (D)
    • Hand wheel effort (F)
  • Gear ratio (GR) formula: [ GR = \frac{T}{F \times \frac{D}{2}} ]
  • Gear materials must comply with Table 1 (materials for gear components).

• Clause 1.1.12 & 1.1.13:

  • Gearing arrangements include spur, worm, bevel gears, and chain & wheel mechanisms.

• Clause 7.13 (Stuffing Box):

  • Minimum inside dimensions per Tables 2 & 3 and Fig. 5 (ensure sealing efficiency).

Typical Material Table (Excerpt from Table 1)

Diagram: Gear Operation Mechanism

graph LR
A[Hand Wheel] -- Effort (F) --> B[Gear Train]
B -- Torque Transmission --> C[Sluice Valve Stem]
C -- Valve Movement --> D[Valve Gate]

Summary: Use IS 2535 for gear design, calculate gear ratio with stem torque and hand wheel effort, and select materials per Table 1. For stuffing box sizing, refer to Tables 2 & 3 with Fig. 5.

IS 14846: Testing of Valves - Key Formulas, Tables & Specs

1. Hydrostatic Test (Clause 10.1.1 & 10.1.2)

• Valves rigidly held at both ends: Closed-end test (Clause B-1).
• Spindle vertical during test (Clause B-1.1).
• No leakage allowed during test.
• Test machine applies force to compress flexible materials without undue valve body load.

2. Test Pressures for Sluice Valves (Table 5)

3. Test Duration for Sluice Valves (Table 6)

4. Dimensions of Body, Seat & Wedge Facing Rings (mm) (Table 4, Clause 7.4)

(Refer full table for all sizes)

Summary:

• Test pressures depend on PN rating.
• Test durations: 5 min (body), 2 min (seat).
• Test setup: spindle vertical, closed-end test for rigidly held valves.
• Dimensional checks per Table 4 ensure correct facing ring sizes.

flowchart TD

IS 14846 — Coating and Painting (Clause 9):

• Surface Preparation:
  All unmachined ferrous surfaces (inside & outside) must be clean, dry, and free from rust/grease before painting.

• Primer:
  Exposed machined ferrous surfaces shall have one coat of aluminium red oxide primer conforming to IS 5660.

• Top Coats:
  Apply two coats of black japan (Type B, IS 341) or paint conforming to IS 9862 / IS 2932 by brush or spray for exterior surfaces. Color as approved by purchaser.

• Optional:
  Valve may be assembled without coating if purchaser requests inspection without coating.

Summary Table for Coating:

Relevant IS Codes for Coating Materials:

• IS 5660: Aluminium red oxide primer
• IS 341: Black japan paint (Type B)
• IS 9862 / IS 2932: Alternative paints for exterior coating

Note: Always ensure coating is done after valve testing and cleaning for durability and corrosion protection.

flowchart TD
    A[Valve Testing] --> B[Surface Cleaning]
    B --> C[Apply Aluminium Red Oxide Primer (IS 5660)]
    C --> D[Apply 2 Coats Black Japan or Paint (IS 341 / IS 9862 / IS 2932)]
    D --> E[Final Inspection & Dispatch]

This ensures corrosion resistance and surface protection per IS 14846 Clause 9.

IS 14846 - Marking: Key Specifications & Tables

Clause 11.2.1:

• Use of Standard Mark is regulated by the Bureau of Indian Standards Act, 1986.
• Licence conditions for Standard Mark use are available from BIS.

Marking Requirements (General)

• Manufacturer’s name or trademark
• Size and pressure rating
• Material grade
• Direction of flow (if applicable)
• Standard mark (only with BIS license)

Key Dimensions for Sluice Valves (Table 2 excerpt for PN 1.0)

Tolerances on Dimensions

Packing & Storage (Clause 13)

• Valves supplied with wedge closed and bright parts rust-protected.

According to IS 14846, Information to be Supplied with Enquiry and Order (Clause 12) requires the purchaser to provide details as per Annex D, which typically includes:

• Valve type and size
• Nominal pressure (PN)
• Body and seat material
• End connections
• Operation type (manual, gear, etc.)
• Optional accessories
• Special requirements (testing, marking, packing)

Key Dimensions & Tolerances (from Tables for PN 1.0 and PN 1.6)

Typical Dimensions for Sluice Valves (PN 1.0 example)

Packing & Storage (Clause 13)

• Valves shipped with wedge closed.
• Bright parts protected against rust.
• Small valves packed in wooden cases.
• Hand wheels removed if shipped loose.
• Store valves in covered, clean areas.

Summary: When ordering, specify valve size, pressure, materials, accessories, and confirm dimensional tolerances per IS 14846 tables. Use the tables for exact dimensions and tolerances to ensure compatibility.

flowchart TD
    A[Enquiry/Order] --> B{Information to Supply}
    B --> C[Valve Type & Size]
    B --> D[Nominal Pressure PN]
    B --> E[Material & End Connections]
    B -->

IS 14846 Key Points:

1. Testing Procedures (Annex B & Clause 3.2)

• Flaw Detection Test:

  • If any sample stem fails, all stems in the lot must be tested.
  • Only flaw-free stems are accepted for valve production.

• Sampling Plan (Clause C-2):

• Reference for Random Sampling: IS 4905

2. Material References (Annex E)

• Important IS standards referenced include:

3. Committee Composition (Annex F)

• Chaired by Shri S. K. Chhabra (Delhi Jal Board)
• Members from:
  • Municipal corporations (Mumbai)
  • Research institutes (CBRI Roorkee, CGCRI Calcutta)
  • Industry representatives (Capstan Meters, Bhaskar Refractories)
  • Central Public Health and Environmental Engineer's Organization

flowchart TD
    A[Lot of Stems] --> B[Random Sampling per C-2 Table]
    B --> C{Flaw Detection Test}
    C -->|Pass| D[Accept stems for production]
    C -->|Fail| E[Test all stems in lot]
    E --> F{Flaw-free?}
    F -->|Yes|