Code of practice for selection, installation and maintenance of sluice valves

IS 2685 – Introduction: Key Points & Specifications

• Scope: Code of Practice for selection, installation, and maintenance of sluice valves (50 to 300 mm size) for waterworks.
• Rounding Off: Final test/analysis values must be rounded as per IS 2-1960, retaining significant places matching specified values.

Key Selection Factors (Clause 2.1)

• Nominal bore of pipe.
• Pipe material: Cast iron, steel, asbestos-cement, concrete-coated steel.
• Location: Underground/above ground; distribution or rising main.
• Valve orientation: Spindle vertical/horizontal; terminal or inline.
• End connections: Flanged, socketed, plain-ended.
• Water quality: Raw/filtered, pH (acidic/alkaline), temperature.
• Water pressure: Working, unbalanced pressure, static head.
• Headstock operation: Operating platform dimensions and headroom.

Important Definitions

• Unbalanced pressure: Pressure difference across valve door when shut; affects operating thrust.

Maintenance (Clause 4.5)

• Inspect valves internally and externally at least annually.
• Adjust or replace stuffing box packing upon leakage detection.

Rounding Off Rule (IS 2-1960)

flowchart TD
    A[Start: Valve Selection] --> B{Check Nominal Bore}
    B --> C[Determine Pipe Material]
    C --> D{Location: Underground/Above}
    D --> E{Valve Orientation}
    E --> F{End Connections}
    F --> G[Assess Water Quality & Pressure]
    G --> H[Confirm Headstock Operation Details]
    H --> I[Select Suitable Sluice Valve]

For detailed dimensions, installation, and maintenance, refer to full IS 2685 document and related standards (e.g., IS 780-1984 for flanges).

IS 2685: Scope & Key Specifications for Sluice Valves (50 to 300 mm)

Scope Highlights (Clause 2.1)

Selection of sluice valves depends on:

• Nominal bore of pipe (50-300 mm)
• Pipe material: cast iron, cast steel, asbestos-cement, steel coated with concrete
• Location: underground or above ground; distribution or rising main
• Valve orientation: spindle vertical/horizontal; inside or terminal pipeline position
• End connections: flanged, socketed, plain-ended
• Water quality:
  • Raw/filtered
  • pH (acidic/alkaline)
  • Temperature
• Pressure considerations:
  • Working pressure
  • Unbalanced pressure (difference across valve door)
  • Static head at valve center

Important Notes on Pressure

• Unbalanced pressure affects valve operation thrust.

Installation (Clause 3.14)

• Ensure jointing material sits squarely between flanges without kinks to prevent leakage.

Rounding Off (Clause 0.3)

• Round final test/analysis values per IS 2:1960 rules.
• Retain same significant figures as specified values.

Summary Table: Valve Selection Factors

flowchart TD
    A[Valve Selection] --> B[Nominal Bore]
    A --> C[Pipe Material]
    A --> D[Location]
    A --> E[Valve Orientation]
    A --> F[End Connections]
    A --> G[Water Quality]
    A --> H[Pressure]
    H --> H1[Working Pressure]
    H --> H2[Unbalanced Pressure]
    H --> H3[Static Head]

For detailed design and testing, refer to IS 2685:1971 and IS 2:1960

IS 2685: Selection of Sluice Valves - Key Points

Governing Factors (Clause 2.1)

• Nominal Bore: Match valve size to pipe diameter.
• Pipe Material: Cast iron, cast steel, asbestos-cement, or concrete-coated steel.
• Situation: Distribution or rising main.
• Location: Underground or above ground.
• Valve Position:
  • Spindle axis: vertical (on horizontal pipes) or horizontal (on vertical pipes).
  • Terminal or inline position.
• End Connections: Flanged, socketed, or plain-ended.
• Water Quality:
  • Raw or filtered.
  • pH (acidic/alkaline).
  • Temperature.
• Pressure:
  • Working pressure.
  • Unbalanced pressure = Pressure difference across valve door (affects operating thrust).
• Headstock Operation Dimensions:
  • Distance from waterway center to headstock base.
  • Distance from spindle center to wall.
  • Available headroom.

Installation (Clause 3.1)

• Spindle vertical on horizontal pipes.
• Spindle horizontal on vertical pipes.
• On slopes, keep spindle vertical if possible, adjusting gradients with connecting pipes.

Typical Selection Table (Nominal Bore vs Valve Type)

Notes:

• Refer IS 780-1969 for detailed valve specifications.
• Unbalanced pressure determines valve operating force.

flowchart LR
    A[Pipe Nominal Bore] --> B[Valve Size Selection]
    C[Pipe Material] --> B
    D[Location & Position] --> B
    E[Water Quality & Pressure] --> B
    B --> F[Valve Type & End Connection]
    F --> G[Installation Guidelines]

For detailed dimensions and pressure ratings, consult IS 780-1969 along with IS 2685 clauses.

IS 2685 - Installation Key Points for Sluice Valves

Installation Guidelines (Clause 3.14)

• Ensure jointing material fits squarely between valve flanges and pipe tails without obstructing the waterway.
• Avoid kinks or folds in jointing material to prevent leakage.
• Proper alignment is critical for valve performance and leak prevention.

Selection Considerations (Clause 2.1)

• Nominal Bore of pipe.
• Pipe Material: Cast iron, cast steel, asbestos-cement, steel coated with concrete.
• Location: Underground/above ground, distribution or rising main.
• Valve Orientation: Vertical/horizontal spindle; inside or terminal position.
• End Connections: Flanged, socketed, plain-ended.
• Water Quality: Raw/filtered, pH, temperature.
• Pressure: Working, unbalanced pressure (difference across closed valve).
• Headstock Operation: Dimensions for operating platform and spindle extension.

Rounding Off (IS 2:1960)

• Final test/analysis values should be rounded off to the same significant figures as specified values.

Summary Table: Installation Checks

flowchart LR
    A[Valve Installation] --> B[Check Jointing Material]
    B --> C{Fits Squarely?}
    C -- Yes --> D[No Obstruction]
    C -- No --> E[Adjust Jointing Material]
    D --> F{Any Kinks?}
    F -- No --> G[Proceed]
    F -- Yes --> E

This ensures leak-free, durable valve installation per IS 2685 standards.

IS 2685 Clause 4.5: Maintenance of Sluice Valves

• Inspection Frequency:

  • Internal and external inspections should be done at least annually.
  • Frequency may increase depending on service conditions and valve operation frequency.

• Stuffing Box Packing:

  • Adjust or replace immediately upon detection of leakage past the spindle.

Key Maintenance Guidelines Summary

Additional Tips (Engineering Practice)

• Lubricate moving parts during inspection.
• Check for corrosion, wear, and mechanical damage.
• Ensure valve operates smoothly without excessive force.
• Record maintenance activities for future reference.

flowchart TD
    A[Start: Valve in Service] --> B{Time for Inspection?}
    B -- Yes --> C[Inspect Valve Internally & Externally]
    C --> D{Leakage Detected?}
    D -- Yes --> E[Adjust/Replace Stuffing Box Packing]
    D -- No --> F[Check Other Components]
    E --> G[Complete Maintenance]
    F --> G
    B -- No --> G
    G --> A

This ensures reliable valve operation and prevents failures.

IS 2685: Safety and Operational Guidelines for Sluice Valves

Key Selection Criteria (Clause 2.1):

• Nominal bore of pipe.
• Pipe material: cast iron, cast steel, asbestos-cement, steel coated with concrete.
• Installation situation: distribution or rising main.
• Location: underground or above ground.
• Valve orientation: spindle vertical/horizontal; inside or terminal pipeline position.
• End connections: flanged, socketed, or plain ended.
• Water quality: raw/filtered, pH (acidic/alkaline), temperature.
• Water pressure: working, unbalanced pressure, static head at valve center.

Important Definitions:

• Unbalanced pressure: Difference in pressure on two sides of closed valve door; affects operating thrust.

Operational Dimensions for Headstock Operation:

• Distance from waterway centerline to headstock base.
• Distance from spindle centerline to wall/masonry face.
• Available headroom on operating platform.

Maintenance Guidelines (Clause 4.5):

• Inspect valves internally and externally at least annually.
• Adjust or replace stuffing box packing immediately upon leakage detection.

Rounding Off Values (Clause 0.3)

• Follow IS:2-1960+ for rounding test/analysis results.
• Retain significant places equal to specified values.

Summary Table: Selection Factors for Sluice Valves

flowchart TD
    A[Valve Selection] --> B[Nominal Bore]
    A --> C[Pipe Material]
    A --> D[Installation Situation]
    A --> E[Location]
    A --> F[Spindle Orientation]
    A --> G[End Connections]
    A --> H[Water Quality]
    A --> I[Water Pressure]
    I --> J[Working Pressure]
    I --> K[Unbalanced

IS 2685 - Annexures and References: Key Points

• Rounding Off Values:
  Per IS 2-1960, final test or analysis values must be rounded to the same number of significant figures as specified in the standard.

• Maintenance Table (Clause 4.5):

  • Inspect valves internally and externally at least annually.
  • Frequency depends on service conditions and valve operation frequency.
  • Adjust or replace stuffing box packing immediately after spindle leakage is detected.

• Referenced Standards:

  • IS 780-1984 (for related valve specifications)
  • IS 3950-1979 (related to valve components)
  • IS 2-1960 (rounding off rules)

• General Specifications:

  • Regular inspection and maintenance are critical for valve longevity and performance.
  • Packing adjustment/replacement is key to preventing leakage.

Summary Table: Valve Inspection Frequency

flowchart TD
    A[Valve in Service] --> B{Leakage Detected?}
    B -- Yes --> C[Adjust/Replace Packing]
    B -- No --> D[Continue Regular Use]
    D --> E[Annual Inspection]
    E --> B

This diagram illustrates the maintenance cycle per IS 2685 guidelines.