{"id":868,"date":"2026-06-26T03:00:58","date_gmt":"2026-06-26T03:00:58","guid":{"rendered":"https:\/\/nmrv063gearbox.com\/worm-gear-reducer-for-dam-gate-drives\/"},"modified":"2026-06-26T03:00:59","modified_gmt":"2026-06-26T03:00:59","slug":"worm-gear-reducer-for-dam-gate-drives","status":"publish","type":"post","link":"https:\/\/nmrv063gearbox.com\/vi\/worm-gear-reducer-for-dam-gate-drives\/","title":{"rendered":"Worm Gear Reducer for Dam Gate Drives"},"content":{"rendered":"
\n

<\/p>\n

Worm Gear Reducer for Dam Gate Drives<\/h2>\n

\"Worm<\/p>\n

Dam spillway gates, weir gates, and irrigation diversion gates are among the most safety-critical mechanical components in Australian water infrastructure. They must operate reliably during flood events — often in difficult outdoor conditions, with infrequent maintenance access — and they must hold their set position against the full hydraulic head of the water body when not in operation. The b\u1ed9 gi\u1ea3m t\u1ed1c b\u00e1nh r\u0103ng tr\u1ee5c v\u00edt<\/strong> is the established drive choice for these applications, providing the mechanical advantage for controlled gate movement and the inherent self-locking property that holds gates stationary against water pressure loads without any external locking mechanism or continuous power supply.<\/p>\n

Australia’s dam and weir infrastructure — managed by state water authorities, WaterNSW, SunWater, Southern Rural Water, and numerous local irrigation trusts — spans thousands of structures from large storage dams to small channel diversion weirs. The worm gearbox in dam gate service must withstand decades of outdoor exposure to UV radiation, temperature cycling, and moisture, while maintaining reliable operation and zero positional drift under the continuous water pressure loads that act on the gate structure.<\/p>\n

For dam safety reasons, gate drive systems must also fail safe — if the drive mechanism fails, the gate must remain in its current position until manual intervention is possible. The worm gearbox’s self-locking geometry provides this fail-safe hold condition as a direct mechanical property, independent of power supply, electronic control, or external brake mechanisms.<\/p>\n

<\/p>\n

\u1ee8ng d\u1ee5ng v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng trong ng\u00e0nh<\/h2>\n

Worm gear reducers serve dam gate drives across multiple structure types and gate configurations:<\/p>\n

    \n
  • Radial (Tainter) gate drives<\/strong> — rotary worm output drives the gate arm for controlled arc movement<\/li>\n
  • Vertical lift gate drives (stoney gates)<\/strong> — worm output drives a rack-and-pinion or lead screw gate lifting mechanism<\/li>\n
  • Weir flashboard actuators<\/strong> — individual flashboard tilting drives for fine water level control<\/li>\n
  • Flap gate drives — tidal and flood-control<\/strong> — controlled opening against tidal or flood backpressure<\/li>\n
  • Irrigation diversion gate drives<\/strong> — remote-operated diversion structure control in rural irrigation schemes<\/li>\n<\/ul>\n

    Material specification for dam gate service:<\/strong> Worm shaft in alloy steel with surface nitriding treatment providing hardness and superior corrosion resistance in exposed outdoor environments. Worm wheel in phosphor bronze — stable in the dilute mineral content of dam water. Housing in ductile iron with a heavy-duty multi-coat protective paint system (two-part epoxy primer + polyurethane topcoat) rated for 20+ year outdoor service life. IP55 minimum; IP65 where the drive housing may be intermittently submerged during flood gate operations.<\/p>\n

    High reliability specification for dam safety:<\/strong> Dam gate drives are typically designed to ANCOLD guidelines which require drive system proof-of-function testing at defined intervals and demonstrated reserve capacity. Worm gearboxes for dam service are typically selected with a safety factor of SF=2.5–3.0 against the calculated gate operating torque. Taper roller bearings on all shafts, premium lubricant, and extended service intervals are standard specifications for these long-lifecycle assets.<\/p>\n

    <\/p>\n

    \n \"Worm\n<\/div>\n

    <\/p>\n

    Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn<\/h2>\n

    S\u1eed d\u1ee5ng b\u1ea3ng b\u00ean d\u01b0\u1edbi \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ki\u1ec3u m\u00e1y ph\u00f9 h\u1ee3p. C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh bao g\u1ed3m t\u1ef7 s\u1ed1 truy\u1ec1n gi\u1ea3m, m\u00f4-men xo\u1eafn \u0111\u1ea7u ra, k\u00edch th\u01b0\u1edbc tr\u1ee5c v\u00e0 v\u1eadt li\u1ec7u v\u1ecf. Lu\u00f4n lu\u00f4n \u00e1p d\u1ee5ng \u0111\u00fang ph\u01b0\u01a1ng ph\u00e1p. H\u1ec7 s\u1ed1 d\u1ecbch v\u1ee5 (SF)<\/strong> cho chu k\u1ef3 l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n
    Tham s\u1ed1<\/th>\nPh\u1ea1m vi\/Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh<\/th>\nGhi ch\u00fa l\u1ef1a ch\u1ecdn<\/th>\n<\/tr>\n<\/thead>\n
    T\u1ef7 l\u1ec7<\/td>\n40:1 – 100:1 standard; tandem for low speed<\/td>\nGate travel speeds typically 0.1–2.0 m\/min<\/td>\n<\/tr>\n
    Output Torque (SF=1.0)<\/td>\n500 – 4,200 N·m single stage<\/td>\nSelect at SF=2.5–3.0 for dam safety design criterion<\/td>\n<\/tr>\n
    V\u1eadt li\u1ec7u x\u00e2y nh\u00e0<\/td>\nDuctile Iron GGG40 + heavy-duty protective coating<\/td>\n20-year minimum coating life specified<\/td>\n<\/tr>\n
    Shaft Material<\/td>\nAlloy steel, nitrided; SS316 for tidal\/coastal<\/td>\nSS316 for saline or coastal dam installations<\/td>\n<\/tr>\n
    Shaft Seals<\/td>\nDouble-lip FKM, IP65\/IP67<\/td>\nIP67 for gates subject to submersion during spill events<\/td>\n<\/tr>\n
    Lo\u1ea1i \u1ed5 tr\u1ee5c<\/td>\nTaper roller on all shafts<\/td>\nHandles combined radial\/axial from gate chain and gravity loads<\/td>\n<\/tr>\n
    B\u00f4i tr\u01a1n<\/td>\nSynthetic PAO ISO VG 460 (5,000 hr interval)<\/td>\nLong intervals critical for remote dam sites<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    ► H\u1ec7 s\u1ed1 d\u1ecbch v\u1ee5 (SF):<\/strong> T\u1ea3i tr\u1ecdng \u0111\u1ed3ng \u0111\u1ec1u SF=1.0 | Va \u0111\u1eadp v\u1eeba ph\u1ea3i SF=1.25\u20131.5 | Va \u0111\u1eadp m\u1ea1nh \/ li\u00ean t\u1ee5c 24 gi\u1edd SF=1.75\u20132.0<\/p>\n

    ► Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh:<\/strong> C\u00e1c thi\u1ebft b\u1ecb ti\u00eau chu\u1ea9n c\u00f3 c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c t\u1eeb -10\u00b0C \u0111\u1ebfn +40\u00b0C. C\u00e1c \u0111\u1ecba \u0111i\u1ec3m c\u00f3 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cao \u1edf \u00dac (>45\u00b0C) y\u00eau c\u1ea7u ch\u1ea5t b\u00f4i tr\u01a1n ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 gi\u1ea3m c\u00f4ng su\u1ea5t do nhi\u1ec7t \u0111\u1ed9 theo ti\u00eau chu\u1ea9n 15%.<\/p>\n

    <\/p>\n

    \n \"H\u1ed9p<\/p>\n
    \n H\u1ed9p s\u1ed1 b\u00e1nh r\u0103ng tr\u1ee5c v\u00edt d\u00f2ng NMRV \/ NRV<\/strong><\/p>\n

    C\u00f3 s\u1eb5n c\u00e1c k\u00edch th\u01b0\u1edbc khung t\u1eeb 025 \u0111\u1ebfn 150. T\u1ef7 s\u1ed1 gi\u1ea3m t\u1ed1c m\u1ed9t c\u1ea5p t\u1eeb 5:1 \u0111\u1ebfn 100:1. M\u00f4-men xo\u1eafn \u0111\u1ea7u ra l\u00ean \u0111\u1ebfn 4.200 N\u00b7m. V\u1ecf b\u1eb1ng nh\u00f4m ho\u1eb7c gang d\u1ebbo. M\u1eb7t b\u00edch \u0111\u1ed9ng c\u01a1 IEC B5\/B14. Ti\u00eau chu\u1ea9n IP65, IP66\/IP67 t\u00f9y ch\u1ecdn. B\u00f4i tr\u01a1n b\u1eb1ng d\u1ea7u t\u1ed5ng h\u1ee3p ho\u1eb7c d\u1ea7u kho\u00e1ng.<\/p>\n<\/p><\/div>\n<\/div>\n

    <\/p>\n

    Ti\u00eau chu\u1ea9n tu\u00e2n th\u1ee7 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng<\/h2>\n
    \n
    \n \u2713 ISO 9001:2015<\/strong>
    \n H\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn. M\u1ed7i s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u00e0 ki\u1ec3m tra theo h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng (QMS) \u0111\u01b0\u1ee3c l\u1eadp th\u00e0nh v\u0103n b\u1ea3n v\u1edbi \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng tin truy xu\u1ea5t ngu\u1ed3n g\u1ed1c.<\/span>\n <\/div>\n
    \n \u2713 Ch\u1ee9ng nh\u1eadn CE<\/strong>
    \n \u0110\u1ea1t ch\u1ee9ng nh\u1eadn CE theo Ch\u1ec9 th\u1ecb v\u1ec1 m\u00e1y m\u00f3c c\u1ee7a EU. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c d\u1ef1 \u00e1n k\u1ef9 thu\u1eadt t\u1ea1i \u00dac v\u00e0 New Zealand.<\/span>\n <\/div>\n
    \n ✓ Giao di\u1ec7n \u0111\u1ed9ng c\u01a1 IEC 60034<\/strong><\/strong>
    \n K\u00edch th\u01b0\u1edbc m\u1eb7t b\u00edch v\u00e0 tr\u1ee5c theo ti\u00eau chu\u1ea9n IEC.<\/strong> T\u01b0\u01a1ng th\u00edch tr\u1ef1c ti\u1ebfp v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c th\u01b0\u01a1ng hi\u1ec7u \u0111\u1ed9ng c\u01a1 l\u1edbn.<\/span>\n <\/div>\n
    \n \u2713 Chu\u1ea9n b\u1ea3o v\u1ec7 IP65 \/ IP66<\/strong>
    \n Ch\u1ed1ng b\u1ee5i v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c tia n\u01b0\u1edbc \u00e1p l\u1ef1c cao. Ti\u00eau chu\u1ea9n cho c\u00e1c c\u00f4ng tr\u00ecnh l\u1eafp \u0111\u1eb7t ngo\u00e0i tr\u1eddi t\u1ea1i \u00dac.<\/span>\n <\/div>\n<\/div>\n

    <\/p>\n

    Nghi\u00ean c\u1ee9u tr\u01b0\u1eddng h\u1ee3p<\/h2>\n
    \n
    \n 🌊<\/span><\/p>\n
    \n

    Case Study 1 — Irrigation Weir Flashboard Drive, Goulburn Murray Water VIC<\/h3>\n
    \n Irrigation Water Management<\/span>
    \n Weir Flashboard Tilting Actuators<\/span>\n <\/div>\n

    V\u1ea5n \u0111\u1ec1 kh\u00e1ch h\u00e0ng g\u1eb7p ph\u1ea3i:<\/strong> A Victorian irrigation authority was manually operating 32 flashboard tilting mechanisms on a control weir — each requiring two operators and 4 hours for a full weir adjustment during flood events. Two drive failures during a 2022 flood event prevented timely weir adjustment.<\/p>\n

    Gi\u1ea3i ph\u00e1p:<\/strong> NRV series worm gearboxes (ratio 80:1, ductile iron with 2-part epoxy coating, IP65, 415V motorised with SCADA interface, taper roller bearings) were installed on all 32 flashboards.<\/p>\n

    K\u1ebft qu\u1ea3:<\/strong> Flood weir adjustment time reduced from 4 hours (8 person-hours) to under 15 minutes via SCADA. The 2024 flood event was managed without any drive failures.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

    \n
    \n 🏜️<\/span><\/p>\n
    \n

    Case Study 2 — Tainter Gate Drive, SunWater Storage Dam QLD<\/h3>\n
    \n Water Storage<\/span>
    \n Tainter Gate Spill Drive — Large Storage Dam<\/span>\n <\/div>\n

    V\u1ea5n \u0111\u1ec1 kh\u00e1ch h\u00e0ng g\u1eb7p ph\u1ea3i:<\/strong> A Queensland storage dam’s three Tainter gate drives were approaching end of design life (35 years) with progressive worm wheel wear evident in all three units. The dam safety engineer rated the drives as ‘marginal’ for continued operation.<\/p>\n

    Gi\u1ea3i ph\u00e1p:<\/strong> NRV-150 worm gearboxes (ratio 60:1, SF=3.0, two-stage tandem arrangement, IP65, extended bearing housings with double-row taper rollers, 3-phase motor with standby diesel generator interface) were installed during a 3-week maintenance window.<\/p>\n

    K\u1ebft qu\u1ea3:<\/strong> ANCOLD dam safety assessment upgraded from ‘marginal’ to ‘compliant’. The two-stage tandem arrangement reduced the required motor power from 22 kW to 7.5 kW.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

    \n
    \n 🌿<\/span><\/p>\n
    \n

    Case Study 3 — Channel Diversion Gate, Murrumbidgee Irrigation NSW<\/h3>\n
    \n Rural Irrigation<\/span>
    \n Diversion Structure Gate Drive — Remote Location<\/span>\n <\/div>\n

    V\u1ea5n \u0111\u1ec1 kh\u00e1ch h\u00e0ng g\u1eb7p ph\u1ea3i:<\/strong> A remote irrigation diversion gate 85 km from the nearest town required daily adjustments for water allocation management, but was only visited twice weekly — causing over-allocation events that attracted water regulator penalty notices.<\/p>\n

    Gi\u1ea3i ph\u00e1p:<\/strong> NMRV-110 worm gearbox (ratio 100:1, solar-panel powered 24V DC motor, RTU for SCADA radio communication, IP65, extended synthetic lubricant interval 5,000 hours) enabled daily remote gate position commands from the irrigation authority’s control room.<\/p>\n

    K\u1ebft qu\u1ea3:<\/strong> Daily gate position compliance achieved. Water regulator penalty notices eliminated in year one post-installation. The on-site visit frequency was reduced to monthly inspection only.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

    <\/p>\n

    \n \"D\u00f2ng<\/p>\n

    H\u1ed9p s\u1ed1 tr\u1ee5c v\u00edt d\u00f2ng NMRV \/ NRV \u2014 k\u00edch th\u01b0\u1edbc khung t\u1eeb 025 \u0111\u1ebfn 150, s\u1ea3n xu\u1ea5t theo ti\u00eau chu\u1ea9n ISO 9001:2015<\/p>\n<\/div>\n

    <\/p>\n

    T\u1ea1i sao n\u00ean ch\u1ecdn ch\u00fang t\u00f4i?<\/h2>\n
    \n
    \n
    🏭<\/div>\n

    H\u01a1n 20 n\u0103m kinh nghi\u1ec7m s\u1ea3n xu\u1ea5t<\/strong>
    \n S\u1ea3n xu\u1ea5t \u0111\u1ea1t ch\u1ee9ng nh\u1eadn ISO t\u1eeb n\u0103m 2003. H\u1ed9p s\u1ed1 tr\u1ee5c v\u00edt \u0111\u01b0\u1ee3c xu\u1ea5t kh\u1ea9u sang h\u01a1n 60 qu\u1ed1c gia.<\/span>\n <\/div>\n

    \n
    📞<\/div>\n

    H\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt t\u1eeb xa<\/strong>
    \n Ch\u1ea9n \u0111o\u00e1n qua cu\u1ed9c g\u1ecdi video tr\u00ean kh\u1eafp c\u00e1c m\u00fai gi\u1edd c\u1ee7a \u00dac. Ph\u1ea3n h\u1ed3i nhanh ch\u00f3ng m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ebfn t\u1eadn n\u01a1i.<\/span>\n <\/div>\n

    \n
    ⚙️<\/div>\n

    T\u00f9y ch\u1ec9nh OEM \/ ODM<\/strong>
    \n Tr\u1ee5c kh\u00f4ng ti\u00eau chu\u1ea9n, l\u1ed7 r\u1ed7ng, m\u1eb7t b\u00edch v\u00e0 t\u1ef7 l\u1ec7 t\u00f9y ch\u1ec9nh. C\u00f3 th\u1ec3 xem x\u00e9t b\u1ea3n v\u1ebd \u0111\u1ea7y \u0111\u1ee7.<\/span>\n <\/div>\n

    \n
    💰<\/div>\n

    Gi\u00e1 tr\u1ecb tr\u1ef1c ti\u1ebfp t\u1eeb nh\u00e0 m\u00e1y<\/strong>
    \n Kh\u00f4ng c\u00f3 hoa h\u1ed3ng cho nh\u00e0 ph\u00e2n ph\u1ed1i. Gi\u00e1 b\u00e1n s\u1ec9 minh b\u1ea1ch v\u1edbi m\u1ee9c ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 cho c\u00e1c \u0111\u01a1n h\u00e0ng l\u1eb7p l\u1ea1i.<\/span>\n <\/div>\n

    \n
    📦<\/div>\n

    H\u00e0ng c\u00f3 s\u1eb5n & Giao h\u00e0ng nhanh<\/strong>
    \n Khung NMRV\/NRV ti\u00eau chu\u1ea9n c\u00f3 s\u1eb5n trong kho. \u0110\u01a1n h\u00e0ng kh\u1ea9n c\u1ea5p s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng d\u1ecbch v\u1ee5 v\u1eadn chuy\u1ec3n nhanh.<\/span>\n <\/div>\n<\/div>\n

    <\/p>\n

    C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n
    \n▼ What safety factor should I apply when designing a worm gearbox for a dam gate drive?<\/summary>\n
    ANCOLD guidelines recommend a minimum safety factor of 2.5 on all dam gate drive mechanical components for dams classified as ‘Significant’ or higher hazard. For ‘High’ or ‘Extreme’ hazard dams, a factor of 3.0 is appropriate. This high safety factor also provides reserve capacity for increased friction loads from gate seal wear, debris accumulation, or corrosion on the gate guide rails over the 30–50 year design life.<\/div>\n<\/details>\n
    \n▼ How is the self-locking of a worm gear dam gate drive verified for dam safety compliance?<\/summary>\n
    Self-locking is verified by: (1) confirming the worm lead angle is below the friction angle for the specific ratio and material combination, and (2) conducting a static hold test on the installed drive with the gate loaded at maximum hydraulic head and confirming zero shaft movement over a defined hold period (typically 24–72 hours). Our gearboxes can be supplied with factory test certificates confirming self-locking torque capacity.<\/div>\n<\/details>\n
    \n▼ What lubricant interval is appropriate for a worm gearbox at a remote dam site with infrequent access?<\/summary>\n
    For remote dam sites: specify synthetic PAO ISO VG 460 lubricant with a 5,000-hour or 3-year change interval (whichever is first). This extended interval aligns with typical 3-year major maintenance cycles for Australian rural infrastructure. The synthetic lubricant also provides better cold-start protection for dam sites in alpine areas where temperatures may fall below –10°C.<\/div>\n<\/details>\n
    \n▼ How does a worm gear dam gate drive handle increased gate friction caused by debris accumulation?<\/summary>\n
    Debris in gate guides increases the gate operating force above the design value. The safety factor (SF=2.5–3.0) in the gearbox selection provides the torque reserve to overcome moderate debris loading. Incorporate a torque trip relay on the gate motor to prevent gearbox overload if the gate jams completely.<\/div>\n<\/details>\n
    \n▼ Can a worm gearbox dam gate drive be operated manually during power failure?<\/summary>\n
    Yes — worm gearboxes used for motorised dam gate drives are typically fitted with a manual override handwheel input. The handwheel bypasses the motor and drives the worm shaft directly. With the standard high ratios used for dam gates (60:1–100:1), the handwheel effort is within safe manual operating limits (typically 150–300 N at the handwheel rim) for gates up to approximately 3,000 N·m required operating torque.<\/div>\n<\/details>\n

    <\/p>\n

    \n

    Consult Our Engineers on Dam Gate Drive Specification<\/h2>\n

    C\u00e1c k\u1ef9 s\u01b0 c\u1ee7a ch\u00fang t\u00f4i s\u1eb5n s\u00e0ng t\u01b0 v\u1ea5n cho b\u1ea1n m\u1eabu h\u1ed9p s\u1ed1 tr\u1ee5c v\u00edt, t\u1ef7 s\u1ed1 truy\u1ec1n, c\u1ea5u h\u00ecnh tr\u1ee5c v\u00e0 c\u00e1ch l\u1eafp \u0111\u1eb7t ph\u00f9 h\u1ee3p nh\u1ea5t cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n

    \n Y\u00eau c\u1ea7u b\u00e1o gi\u00e1 mi\u1ec5n ph\u00ed<\/a>
    \n     Xem t\u1ea5t c\u1ea3 s\u1ea3n ph\u1ea9m<\/a>\n <\/div>\n

    T\u00ecm hi\u1ec3u th\u00eam v\u1ec1... trang \u1ee9ng d\u1ee5ng<\/a> ho\u1eb7c t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 ch\u00fang t\u00f4i tr\u00ean trang gi\u1edbi thi\u1ec7u v\u1ec1 ch\u00fang t\u00f4i<\/a>.<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Worm Gear Reducer for Dam Gate Drives Dam spillway gates, weir gates, and irrigation diversion gates are among the most safety-critical mechanical components in Australian water infrastructure. They must operate reliably during flood events — often in difficult outdoor conditions, with infrequent maintenance access — and they must hold their set position against the full […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2344],"tags":[2494,2496,2497,2495,911],"class_list":["post-868","post","type-post","status-publish","format-standard","hentry","category-water-wastewater","tag-dam-gate-drive","tag-spillway-gate","tag-water-authority","tag-weir-gate-gearbox","tag-worm-reducer"],"_links":{"self":[{"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/posts\/868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/comments?post=868"}],"version-history":[{"count":1,"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/posts\/868\/revisions"}],"predecessor-version":[{"id":954,"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/posts\/868\/revisions\/954"}],"wp:attachment":[{"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/media?parent=868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/categories?post=868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nmrv063gearbox.com\/vi\/wp-json\/wp\/v2\/tags?post=868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}