Overview
ISO 24649:2022 - "Agricultural irrigation equipment - Manually and hydraulically operated plastics valves" - specifies general requirements and test methods for plastic valves used in agricultural irrigation systems. It applies to manually and hydraulically operated plastics valves of nominal sizes DN 8 (1/4") to DN 200 (8") and covers construction, materials, performance testing and marking. The standard replaces and updates previous guidance to include hydraulically operated valves in addition to manually operated types.
Key technical topics and requirements
- Scope and intended use
- Valves for irrigation piping networks using water up to 60 °C; compatible with fertilizers and commonly used irrigation chemicals (including treated sewage water).
- Materials and construction
- Valve bodies must be opaque and plastics UV resistant; workmanship must be free from defects (no holes, bubbles, flash).
- Spare parts availability during the guarantee period is required; manufacturers must provide information on chemical resistance on request.
- Dimensions and connections
- Face-to-face dimensions for flanged valves referenced to ISO 5752; flanged connections per ISO 7005‑1 or ISO 9624. Threaded ends should comply with ISO 7‑1 or be supplied with adaptors.
- Sealing elements and elastomers
- Disc facing ring and O‑ring requirements: hardness testing per ISO 48‑2; O‑ring hardness 60–80 Shore A ±5; compression set limits ≤ 20 % (ISO 815‑1 test conditions noted).
- Ageing limits for disc facing rings: change in hardness between −5 and +8 Shore A after accelerated ageing (ISO 188).
- Mechanical and functional tests
- Test methods include operating and closing torque, resistance to increased torque, pressure loss, hydrostatic shell testing, seat and stem sealing, performance at increased hydraulic pressure, and endurance testing. Standard test conditions commonly use water at 23 ± 5 °C.
- Marking and sampling
- Requirements for marking, type tests and acceptance tests (sampling per ISO 2859‑1) are included to support conformity and quality control.
Practical applications - who uses ISO 24649:2022
- Valve manufacturers - design, material selection, production control and warranty/spare-parts policies.
- Test laboratories and QA teams - perform required mechanical and sealing tests, hydrostatic testing and endurance assessments.
- Irrigation system designers and contractors - specify compliant valves for pipelines and automated systems.
- Procurement and certification bodies - assess conformity, acceptance testing and marking for supply contracts.
- Maintenance teams - reference for spare-part interchangeability and service limits.
Related standards
- ISO 5752 (face-to-face dimensions), ISO 7005‑1 / ISO 9624 (flanged connections)
- ISO 7‑1 (pipe threads), ISO 48‑2 (rubber hardness), ISO 815‑1 (compression set), ISO 188 (accelerated ageing)
- ISO 8233 (torque test), ISO 9644 (pressure loss in irrigation valves)
These referenced standards provide complementary test methods and dimensional guidance used alongside ISO 24649:2022.
Keywords: ISO 24649:2022, agricultural irrigation equipment, plastics valves, manually operated valves, hydraulically operated valves, valve test methods, irrigation system valves.
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