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IS 7197:1974 is the Indian Standard (BIS) for double action floor springs (without oil check) heavy door. This standard specifies the requirements for materials, dimensions, manufacture, and performance of double-action floor springs without oil check (non-hydraulic), designed for heavy doors. It provides three standard sizes based on door weight and outlines testing procedures, including an endurance test, to ensure durability and proper function.
Specification for double action floor springs (without oil check) heavy door
EN 1154:1996 + A1:2002CEN (European Committee for Standardization), Europe
MediumCurrent
Building hardware - Controlled door closing devices - Requirements and test methods
Covers hydraulically controlled floor springs, the modern evolution of the product type in IS 7197.
ANSI/BHMA A156.4-2019BHMA (Builders Hardware Manufacturers Association) / ANSI (American National Standards Institute), USA
MediumCurrent
Door Controls - Closers
Specifies performance criteria for hydraulic door closers, including floor-recessed models.
Key Differences
≠The most significant difference is that IS 7197 is for springs 'without oil check' (non-hydraulic), while modern standards like EN 1154 and ANSI/BHMA A156.4 mandate controlled closing via hydraulic damping.
≠International standards use a detailed power-sizing system (e.g., EN 1 to EN 7) based on closing moment (Nm), allowing precise matching to door width and weight. IS 7197 uses a simpler three-size system (1, 2, 3) based on door dimensions and a simple force test.
≠EN 1154 and ANSI/BHMA A156.4 include specific classifications and rigorous testing for use on fire and smoke control doors. IS 7197 does not address fire performance.
≠The required endurance is far lower in the Indian Standard. IS 7197 mandates 100,000 cycles, whereas EN 1154 requires 500,000 cycles, and ANSI/BHMA A156.4 requires up to 2,000,000 cycles for its highest grade.
Key Similarities
≈All standards cover the same fundamental product category: floor-recessed devices intended to automatically close a door.
≈All standards mandate a mechanical endurance or cycle test to evaluate the product's durability and operational lifespan, even though the required number of cycles varies significantly.
≈Both the IS code and its international counterparts specify requirements for the materials used in construction (e.g., cast iron, steel) to ensure strength and prevent failure.
≈The standards link the size or power of the floor spring to the dimensions and/or weight of the door it is intended to operate, ensuring proper functionality.
Parameter Comparison
Parameter
IS Value
International
Source
Closing Control Mechanism
Without oil check (non-hydraulic)
Mandatory hydraulic control (oil check)
EN 1154
Endurance Test Cycles
100,000 cycles
500,000 cycles
EN 1154
Closing Force/Moment Measurement
Minimum closing force (e.g., 30 N for Size 3) measured at a single point.
Closing moment (torque, e.g., 18 Nm for EN3) measured through an arc of motion.
EN 1154
Sizing System
3 sizes based on door dimensions and weight.
7 power sizes (EN 1-7) based on door width and closing moment.
EN 1154
Fire Door Suitability
Not specified.
Specific classification digit (0=Not suitable, 1=Suitable) with mandatory testing.
EN 1154
Highest Grade Endurance
100,000 cycles
2,000,000 cycles (Grade 1)
ANSI/BHMA A156.4
Adjustability
Not specified or required.
Requirements for adjustable closing speed, latching speed, and optional backcheck/delayed action.
EN 1154 / ANSI/BHMA A156.4
⚠ Verify details from original standards before use
Key Values5
Quick Reference Values
Maximum door weight (Size 3)125 kg
Endurance test cycles100,000 cycles
Body material specificationGrey cast iron, Grade FG 150 conforming to IS 210
Spring material specificationSpring steel, Grade 3 conforming to IS 4454 (Part 1)
Top plate materialBrass or stainless steel
Tables & Referenced Sections
Key Tables
Table 1 - Dimensions of Floor Springs and Top Pivots