{"id":4907,"date":"2026-11-06T16:00:17","date_gmt":"2026-11-06T08:00:17","guid":{"rendered":"https:\/\/wanantec.com\/product\/eco-type-gauging-hatch\/"},"modified":"2026-11-06T17:46:25","modified_gmt":"2026-11-06T09:46:25","slug":"eco-type-gauging-hatch","status":"publish","type":"product","link":"https:\/\/wanantec.com\/ru\/%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%82\/eco-type-gauging-hatch\/","title":{"rendered":"Eco-Type Gauging Hatch"},"content":{"rendered":"

Eco-Type Gauging Hatch \u2014 DN200, ASME B16.5 Class 150 RF<\/h2>\n

The WANAN eco-type gauging hatch is a vapour-tight gauging port for atmospheric storage tanks. It lets the operator gauge liquid level, measure water bottom, take a temperature reading or draw a sample without releasing product vapour to atmosphere \u2014 protecting both the environment and the people working on the tank roof from hydrocarbon exposure.<\/p>\n

The body is a single ductile iron casting with an ASME B16.5 Class 150 raised-face flange. The cover is counter-weighted and spring-assisted: it opens through a 90\u00b0 arc, stays open while the tape is lowered, and closes onto a PTFE seat to restore the vapour seal. Every hatch is tightness-tested at +6 000 Pa before delivery.<\/p>\n\n\n\n
DN200 (8″)<\/strong>
\nNominal size<\/td>\n		CL150 RF<\/strong>
\nASME B16.5 flange<\/td>\n		+6 000 Pa<\/strong>
\nTightness test<\/td>\n		SS304 \/ PTFE<\/strong>
\nWetted trim<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Why replace an open gauge hatch?<\/h2>\n

Every open gauging hatch on a tank roof is an uncontrolled vapour connection. Hydrocarbons escape each time the cover is lifted for a level reading, a water-bottom check or a sample, and the vapour cloud collects around the operator’s position on the roof. Beyond the product loss, that leakage is the usual cause of odour complaints around tank farms and of failures in emission inspections.<\/p>\n

The eco-type hatch closes that path. The cover seals on a PTFE gasket, the guide slot lets the tape pass without propping the cover open, and the counterweight keeps the cover clear of the operator’s hands during the measurement. The result is a gauging point that behaves like a closed system in normal service, while remaining as quick to use as an open hatch.<\/p>\n

Construction and working principle<\/h2>\n

The lower body carries the tank flange and the seating face. A PTFE gasket sits in the body groove and a matching PTFE cover seal is recessed into the cover plate, so the two sealing faces close metal-to-PTFE rather than metal-to-metal. The cover plate hinges on a swivel shaft with a lifting spindle; a counterweight and an SS304 chain hold it open through the full 90\u00b0 arc. The slide slot in the cover is sized for standard gauging tapes and sampling bottles, and a guide plate keeps the tape centred on the dip point.<\/p>\n

Because the wetted parts are SS304 and PTFE, the hatch suits crude oil, gasoline, diesel, jet fuel, solvents, aromatics and alcohols, as well as corrosive service where a painted carbon steel hatch would degrade. The ductile iron body provides the flange stiffness and impact resistance needed on a tank roof at a fraction of the cost of a fully stainless body.<\/p>\n

Technical specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\n\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438<\/th>\n<\/tr>\n
\u041f\u0440\u043e\u0434\u0443\u043a\u0442<\/td>\nEco-type gauging hatch (vapour-tight gauge hatch cover)<\/td>\n<\/tr>\n
Nominal size<\/td>\nDN200 (8″), other sizes on request<\/td>\n<\/tr>\n
Flange<\/td>\nASME B16.5 Class 150 raised face, 8-\u03a622 bolt holes; JIS \/ DIN \/ EN on request<\/td>\n<\/tr>\n
Tightness<\/td>\n+6 000 Pa air test on every unit, no leakage permitted<\/td>\n<\/tr>\n
Body \/ cover material<\/td>\nDuctile iron body and cover plate, stainless steel wetted trim<\/td>\n<\/tr>\n
Wetted trim<\/td>\nSS304 guide plate, slide slot, chain, hinge and fasteners; PTFE seat and cover seal<\/td>\n<\/tr>\n
Cover opening<\/td>\n90\u00b0 arc, counter-weighted, spring assisted, chain retained<\/td>\n<\/tr>\n
Cover OD \/ neck OD<\/td>\n\u03a6345 mm \/ \u03a6298.5 mm<\/td>\n<\/tr>\n
\u0413\u0430\u0431\u0430\u0440\u0438\u0442\u043d\u044b\u0435 \u0440\u0430\u0437\u043c\u0435\u0440\u044b<\/td>\nL 660 mm \u00d7 H 340 mm<\/td>\n<\/tr>\n
\u0421\u0435\u0440\u0432\u0438\u0441<\/td>\nAtmospheric storage tanks \u2014 crude, gasoline, diesel, jet fuel, solvents, aromatics, alcohols<\/td>\n<\/tr>\n
Drawing reference<\/td>\nHN-2021-A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Component materials<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u041f\u0443\u043d\u043a\u0442<\/th>\n\u041a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442<\/th>\n\u041c\u0430\u0442\u0435\u0440\u0438\u0430\u043b<\/th>\n<\/tr>\n
1 \/ 6<\/td>\nBody (lower) \/ cover plate<\/td>\nDuctile iron<\/td>\n<\/tr>\n
2 \/ 4<\/td>\nBody gasket \/ cover seal<\/td>\nPTFE<\/td>\n<\/tr>\n
3 \/ 9<\/td>\nHandwheel \/ swivel shaft<\/td>\nDuctile iron<\/td>\n<\/tr>\n
5 \/ 7 \/ 8<\/td>\nSeal cover \/ slide slot \/ lifting spindle<\/td>\nSS304<\/td>\n<\/tr>\n
10<\/td>\nValve plug with O-ring, \u03a610<\/td>\nDuctile iron<\/td>\n<\/tr>\n
11 \/ 12 \/ 14 \/ 15 \/ 16 \/ 17 \/ 18<\/td>\nGuide plate, swivel shaft, retaining ring, pin \u03a64\u00d720, chain, plug, housing<\/td>\nSS304<\/td>\n<\/tr>\n
13<\/td>\nWheel axle M12\u00d790<\/td>\nSteel, zinc plated<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Other sizes, materials and flange standards can be quoted on request.<\/p>\n

Where it is used<\/h2>\n