Water Fittings - Copper Alloy Float Valves (Horizontal Plunger Type)

IS 1703 - Scope: Key Dimensions & Specifications for Float Valve Components

The standard covers dimensions and tolerances for low and high pressure float valves, including pistons, levers, and valve bodies for nominal sizes 15 mm to 50 mm.

1. Piston Dimensions (Clause 7.6 & Tables 4a & 4b)

• Thread standard: ISO metric threads as per IS 4218 (Parts 1 to 6).
• Slot dimensions for piston to accommodate lever heel:
  • Width = C + 0.1 mm
  • Length = D + P (P varies with size: 0.8 to 1.6 mm)

2. Lever Dimensions (Clause 7.7 & Tables 5a & 5b)

IS 1703 Key References: Dimensions & Specifications for Float Valve Components

1. Piston Dimensions (Low & High Pressure Float Valves)

• Thread standards: External threads conform to ISO metric screw threads as per IS 4218 (Parts 1-6).
• Slot dimensions: Width = Cap opening (C) + 0.1 mm; Length = Cap length (D) + P (P varies with size).

2. Lever Dimensions (Low & High Pressure)

IS 1703: Classification - Key Specifications & Tables

1. Classification by Pressure Type:

   • Dimensions for low pressure and high pressure valve bodies and fittings are distinctly specified.
   • Refer to:
     • Table 2(a): Body dimensions for low pressure valves.
     • Table 2(b): Body dimensions for high pressure valves.
     • For 15 mm float valves with vertical inlet shank:
       • Table 3(a): Low pressure body & inlet pipe dimensions.
       • Table 3(b): High pressure body & inlet pipe dimensions.
     • See Fig 2 for dimensional illustrations.

2. Lever Arm Requirements:

   • Minimum lengths for long arm and short arm of levers are specified in Table 7.
   • Corresponding load values are increased proportionately for testing accuracy.

3. Rounding Off Values:

   • Follow IS 2:1960 for rounding off numerical results.
   • Retain the same number of significant figures as specified in IS 1703.

Example: Lever Arm Dimensions (Table 7 excerpt)

(Note: Actual table values should be referred from IS 1703 Table 7)

flowchart LR
    A[Valve Classification] --> B[Low Pressure]
    A --> C[High Pressure]
    B --> D[Table 2(a) & 3(a)]
    C --> E[Table 2(b) & 3(b)]
    A --> F[Lever Arm Specs]
    F --> G[Table 7: Arm Lengths & Loads]

Summary: IS 1703 classifies valves by pressure with distinct dimensional tables and lever arm specifications to ensure standardized testing and manufacture.

IS 1703 Key Specifications for Nominal Sizes (Float Valve Components)

1. Body Dimensions (Clause 7.4)

• Minimum thickness of outlet nose and piston socket:

2. Lever Dimensions (Clause 7.7.2, Table 5(b))

| Particulars | Nominal Size (mm) | 15 | 20 | 25 | 32 | 40 | 50 | |-----------------------------------------------|-------------------|------|------|------

IS 1703: Materials and Key Specifications for Float Valves

1. Materials (Clause 5.1, Table 1)

2. Key Dimensions (Clause 7.4, Tables 2a & 2b)

Thickness of outlet nose & piston socket varies by size (e.g., 16 mm for 15 & 20 mm sizes).

3. Lever Dimensions (Clause 7.7.2, Table 5b)

IS 1703: Manufacture and Workmanship - Key Points

1. Materials (Clause 5.1, Table 1)

2. Manufacture & Machining (Clause 6.2)

• All parts must be machined to true shape within specified dimensional limits.
• Ensure correct alignment during assembly.
• Machined surfaces must be smooth-finished.

3. Lever Specifications (Clause 7.7.2)

• Lever section must be rigid enough to avoid deformation under normal use.
• Must be ductile enough for bending adjustments without damage.

4. Dimensional Tables for Float Valve Bodies

• Low Pressure Float Valve (Table 2a)

  • Thickness of outlet nose & piston socket varies by size (e.g., 6 mm for 15 & 20 mm sizes).
  • Key dimensions include bore of seating (A), outer diameter (B), length (C), thickness of ears (F), etc.

• High Pressure Float Valve (Table 2b)

  • Similar dimensions with adjustments for higher pressure.
  • Includes thickness from root of flange (Q).

Example: Thickness of Outlet Nose (Low Pressure Valve)

Summary Diagram: Manufacturing Flow

flowchart TD
    A[Material Selection per Table 1] -->

IS 1703: Dimensions and Construction Key Points

1. Lever Section (Clause 7.7.2)

• Must be rigid enough to avoid deformation under normal use.
• Should be ductile for bending adjustments without damage.

2. Body Dimensions (Clause 7.4)

• Low Pressure Float Valve: See Table 2(a)
• High Pressure Float Valve: See Table 2(b)
• For 15 mm float valves with vertical inlet shank, use Table 3(a) (low pressure) and Table 3(b) (high pressure).

3. Important Dimensions (mm)

4. Minimum Thickness of Metal (Outlet Nose & Piston Socket)

• 1.6 mm for 15 & 20 mm sizes
• 2.4 mm for 25 mm size
• 2.8 mm for 32 & 40 mm sizes
• 3.6 mm for 50 mm size

5. Notes on Threads and Pins

• Split coller pins per IS 549.
• Screw threads per IS 4218 (Part 5).
• Nut dimensions per IS 1364 (Parts 1 to 5).

Summary Diagram: Lever & Body Key Dimensions

graph LR
A[Bore of Seating (A)] --> B[Outer Diameter (B)]
B --> C[Length of Seating (C)]
C --> F[Thickness of Ears (F)]
F --> H[Diameter of Hole for Split Pin (H

IS 1703 - Testing: Key Formulas, Tables & Specifications

1. Hydraulic Test (Clause 8.1)

• Conducted to check the pressure resistance of the component.
• Apply gradually increasing hydraulic pressure up to the specified test pressure.
• No leakage or failure should occur during the test.

2. Mechanical Strength of Lever (Clause 8.3)

• Levers must withstand a test load applied gradually at specified leverage points without permanent deformation.
• Test load and lever arm lengths are given in Table 7.

3. Table 7: Lever Arm & Load Requirements

Note: The exact values depend on the lever type and are specified in Table 7 of IS 1703.

4. Rounding Off Results

• Follow IS 2:1960 for rounding off numerical test values.
• Retain the same number of significant digits as specified in IS 1703.

flowchart LR
    A[Start Test] --> B{Hydraulic Test}
    B -->|Pass| C[Mechanical Strength Test]
    B -->|Fail| D[Reject]
    C -->|Pass| E[Report Results]
    C -->|Fail| D
    E --> F[Round off per IS 2:1960]
    F --> G[End]

Summary:

• Use Table 7 for lever arm lengths and test loads.
• Hydraulic test ensures pressure integrity.
• Mechanical test ensures lever strength without permanent set.
• Report results with proper rounding as per IS 2:1960.

IS 1703: Marking and Packaging Key Points

Marking (Clause 9.1)

Each float valve must be legibly and permanently marked with:

• Manufacturer's name or trade-mark
• Size and class of the float valve
• Date of manufacture or batch number

Standard Mark

• Use of the BIS Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• It ensures compliance with the standard under strict inspection, testing, and quality control.
• Continuous conformity checks by BIS safeguard product quality.
• Licensing details for the Standard Mark are available from BIS.

Rounding Off (General)

• Follow IS 2:1960 for rounding numerical values in test reports.
• Retain the same number of significant places as specified in IS 1703.

Packaging (General Practice)

• Although IS 1703 does not specify detailed packaging norms, typical packaging should:
  • Protect valves from damage during transport and storage.
  • Include clear labels with the marking information.
  • Use corrosion-resistant materials if required.

Summary Table for Marking Requirements

If you need detailed material specs or manufacturing guidelines, refer to Table 1 (Clause 5.1) and Clause 6 of IS 1703.

flowchart TD
    A[Float Valve] --> B[Marking]
    B --> C[Manufacturer Name]
    B --> D[Size & Class]
    B --> E[Date/Batch No.]
    A --> F[Packaging]
    F --> G[Protection during transport]
    F --> H[Clear labeling]
    F --> I[Corrosion resistance]

IS 1703: Installation & Maintenance - Key Dimensions & Specifications

Installation Dimensions (Clause 7.4 & Tables 2 & 3)

• Body Dimensions vary by nominal size (15 to 50 mm) and pressure (Low/High).
• Key parameters include:
  • Bore of seating (A)
  • Outer diameter of seating (B)
  • Length of seating (C)
  • Diameter of flange (D)
  • Centre of body to outlet nose (E)
  • Thickness of ears (F)
  • Diameter of hole for split pin (H)
  • Length of inlet shank (K)
  • Bore of outlet nose (L)
  • Length of spigot (M)
  • Bore of inlet (P)
  • Thickness from root of flange (Q)

Lever Specifications (Clause 7.7)

• Lever must be rigid yet ductile for adjustment.
• Dimensions include:
  • Length from fulcrum to lock nut face (long arm)
  • Length from fulcrum to piston center (R)
  • Thickness of flat end (C)
  • Diameter of fulcrum hole for split pin (E)
  • Width of metal around fulcrum hole (F)
  • Screw thread for float boss (G)

Piston Dimensions (Clause 7.6 & Table 4)

• Diameter and length vary by nominal size.
• Thread sizes conform to IS 4218.
• Slot dimensions for lever heel accommodation:
  • Width = Opening in cap + 0.1 mm
  • Length = Length of cap + P (P varies by size)

Minimum Thickness of Metal (Outlet nose & piston socket)

Summary Table Example (Body for Low Pressure, 15 mm)

IS 1703:2000 primarily deals with specifications for cast iron pipes and fittings for water supply.

Key Points on Referenced Indian Standards (IS) in IS 1703:

• The standard references multiple IS codes for materials, testing, and dimensions.
• IS 2:1960 is cited for rounding off numerical values.
• Other commonly referenced IS codes in IS 1703 include:
  • IS 1536: Cast iron pipes and fittings — Dimensions.
  • IS 1726: Cast iron pipes and fittings — Testing methods.
  • IS 1239: Mild steel tubes, tubulars, and other steel fittings.
  • IS 3589: Cement mortar lining for cast iron pipes.
  • IS 7834: Rubber rings for joints.

Rounding Off Rule (from IS 2:1960):

• Round off the final value to the same number of significant digits as specified in the standard.
• Example: If specified as 25.0 mm, round to one decimal place.

Summary Table of Common IS References in IS 1703

graph LR
A[IS 1703: Cast Iron Pipes] --> B[IS 1536: Dimensions]
A --> C[IS 1726: Testing]
A --> D[IS 3589: Mortar Lining]
A --> E[IS 7834: Rubber Rings]
A --> F[IS 2: Rounding Off Rules]

This list ensures compliance with dimensional accuracy, material quality, and testing protocols for cast iron pipes and fittings.

IS 1703: Committee Composition Summary

• Committee responsible: Sanitary Appliances and Water Fittings Sectional Committee, CED 3 (Annex B)
• Chairman: Shri S K Chhabra (Delhi Jal Board)
• Members: Representatives from various organizations including municipal corporations, research institutes (CBRI, Central Glass & Ceramic), manufacturers (Hindustan Sanitaryware, Leader Valves), government departments (CPWD), and water authorities.

Key Specifications Related to Committee Composition

• The detailed committee members list is provided in Annex B of IS 1703.
• The committee includes experts from:
  • Government bodies
  • Industry manufacturers
  • Technical research institutes
  • Public health engineering institutions

Additional Relevant Tables (for context)

• Table 6: Dimensions of Back Nut (Clause 7.11) for nominal sizes 15 to 50 mm.
• Table 7: Load Carrying Capacity of Lever (Clause 8.3) for nominal sizes 15 to 50 mm.

Visual Summary of Committee Composition

graph TD
    A[Chairman: Shri S K Chhabra] --> B[Delhi Jal Board]
    A --> C[Members]
    C --> D[Municipal Corporations]
    C --> E[Research Institutes]
    C --> F[Manufacturers]
    C --> G[Government Departments]
    C --> H[Water Authorities]

Note: For exact names and organizations, refer to Annex B of IS 1703.