{"id":1091,"date":"2026-09-22T06:07:03","date_gmt":"2026-09-22T06:07:03","guid":{"rendered":"https:\/\/wdlvalve.com\/?p=1091"},"modified":"2026-10-08T13:20:51","modified_gmt":"2026-10-08T13:20:51","slug":"%d8%b5%d9%85%d8%a7%d9%85%d8%a7%d8%aa-%d9%85%d8%b9%d8%a7%d9%84%d8%ac%d8%a9-%d8%a7%d9%84%d9%85%d9%8a%d8%a7%d9%87-%d9%88%d9%85%d9%8a%d8%a7%d9%87-%d8%a7%d9%84%d8%b5%d8%b1%d9%81-%d8%a7%d9%84%d8%b5%d8%ad","status":"publish","type":"post","link":"https:\/\/wdlvalve.com\/ar\/%d8%b5%d9%85%d8%a7%d9%85%d8%a7%d8%aa-%d9%85%d8%b9%d8%a7%d9%84%d8%ac%d8%a9-%d8%a7%d9%84%d9%85%d9%8a%d8%a7%d9%87-%d9%88%d9%85%d9%8a%d8%a7%d9%87-%d8%a7%d9%84%d8%b5%d8%b1%d9%81-%d8%a7%d9%84%d8%b5%d8%ad\/","title":{"rendered":"\u0635\u0645\u0627\u0645\u0627\u062a \u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u0645\u064a\u0627\u0647 \u0648\u0645\u064a\u0627\u0647 \u0627\u0644\u0635\u0631\u0641 \u0627\u0644\u0635\u062d\u064a"},"content":{"rendered":"
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Water and wastewater treatment valves provide isolation, throttling,
\nreverse-flow prevention and pressure management in treatment plants,
\npumping stations, pipelines and sludge systems. WDL Valve supplies
\nbutterfly, gate, ball, check, diaphragm and control valves for raw
\nwater, drinking water, wastewater, aeration and chemical-dosing service.<\/p>\n

What Are Water and Wastewater Treatment Valves?<\/span><\/p>\n<\/header>\n

Water and wastewater treatment valves control the movement of water,
\nair, sludge and treatment chemicals through a plant. They isolate
\nequipment, regulate flow, prevent reverse flow, reduce pressure and
\nprotect pumps and pipelines.Valve selection depends on the medium, solids content, pressure,
\ntemperature, operating frequency and installation environment.
\nMaterials, seats, coatings and actuators must be selected as a
\ncomplete system rather than as separate components.<\/section>\n
\n

Where Are Valves Used in Water Treatment Plants?<\/h2>\n

Valves are installed at each stage between the raw-water intake and
\nthe treated-water outlet. Wastewater plants also require valves for
\nsewage, sludge, aeration and chemical treatment.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Treatment Area<\/th>\n\u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u0635\u0645\u0627\u0645<\/th>\nService Conditions<\/th>\n\u0623\u0646\u0648\u0627\u0639 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/th>\n<\/tr>\n<\/thead>\n
Raw-water intake<\/td>\nIsolation and pump protection<\/td>\nSand, debris and continuous water flow<\/td>\n\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u0631\u0627\u0634\u0629\u060c \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0628\u0648\u0627\u0628\u0629\u060c \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u062d\u0635<\/td>\n<\/tr>\n
Filtration system<\/td>\nFilter isolation and backwash control<\/td>\nFrequent cycling and changing flow direction<\/td>\nButterfly, ball and control valves<\/td>\n<\/tr>\n
Drinking-water distribution<\/td>\nIsolation, pressure control and non-return protection<\/td>\nClean-water service with hygiene requirements<\/td>\nButterfly, gate, ball and check valves<\/td>\n<\/tr>\n
Wastewater inlet<\/td>\nIsolation and flow routing<\/td>\nSewage, suspended solids and debris<\/td>\nGate, butterfly and check valves<\/td>\n<\/tr>\n
Sludge system<\/td>\nIsolation and sludge transfer<\/td>\nThick, abrasive or fibrous media<\/td>\nKnife gate, ball and diaphragm valves<\/td>\n<\/tr>\n
Aeration system<\/td>\nAir isolation and flow regulation<\/td>\nLow-pressure air and frequent adjustment<\/td>\nButterfly, ball and control valves<\/td>\n<\/tr>\n
Chemical dosing<\/td>\nAccurate dosing and chemical isolation<\/td>\nAcids, alkalis, disinfectants and coagulants<\/td>\nDiaphragm, ball, needle and control valves<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
\n

WDL Valve Products for Water Treatment Projects<\/h2>\n

The following products are selected from the existing WDL Valve
\nwebsite. Final size, material, seat, coating and actuator are
\nconfigured according to the water quality and operating conditions.<\/p>\n

\n
\"WDL<\/p>\n

Stainless Steel Gate Valve<\/h3>\n

 <\/p>\n

Full-flow isolation valve for clean water, treated water
\nand selected chemical services.<\/p>\n<\/article>\n

\"WDL<\/p>\n

Flanged Swing Check Valve<\/h3>\n

 <\/p>\n

Prevents reverse flow in pump outlets, treatment systems
\nand water transmission pipelines.<\/p>\n<\/article>\n

\"WDL<\/p>\n

Plunger Flow Control Valve<\/a><\/h3>\n

 <\/p>\n

Controls flow and pressure in water transmission,
\npumping and reservoir systems.<\/p>\n<\/article>\n<\/div>\n<\/section>\n

\n

Which Valve Type Should Be Selected?<\/h2>\n

\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u0631\u0627\u0634\u064a\u0629<\/h3>\n

Butterfly valves are widely used in large water pipelines because
\nthey are compact, relatively light and easy to automate. Resilient
\nseats are common in clean-water service, while more demanding
\nconditions may require high-performance or metal-seated designs.<\/p>\n

Gate and Knife Gate Valves<\/h3>\n

Gate valves provide a straight flow path for water isolation.
\nKnife gate valves are better suited to wastewater and sludge
\ncontaining suspended solids, fibers or sediment. Standard gate
\nvalves should normally be used fully open or fully closed.<\/p>\n

\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0643\u0631\u0648\u064a\u0629<\/h3>\n

Ball valves provide tight shutoff and low flow resistance. They are
\ncommonly used in treatment chemicals, clean water, sampling and
\nsmaller process lines. Seat and seal compatibility must be checked
\nfor chemical-dosing applications.<\/p>\n

\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u062d\u0635<\/h3>\n

Check valves protect pumps and pipelines from reverse flow. Swing,
\ndual-plate, axial-flow and other designs have different closing
\nspeeds and pressure losses. Selection should consider flow velocity,
\npump operation and water-hammer risk.<\/p>\n

Diaphragm Valves<\/h3>\n

Diaphragm valves separate the medium from the stem and other moving
\ncomponents. They are suitable for selected chemical-dosing,
\ncorrosive-liquid and contamination-sensitive applications.<\/p>\n

\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645<\/h3>\n

Control valves regulate flow, pressure or water level. Plunger
\nvalves are often considered for water systems that require stable
\nregulation, pressure reduction or resistance to cavitation.<\/p>\n<\/section>\n

\n

How Are Valve Materials Selected?<\/h2>\n

Material selection begins with water chemistry and the function of
\nthe valve. Raw water, drinking water, sewage, sludge and dosing
\nchemicals create different corrosion and wear conditions.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0645\u0648\u0627\u062f<\/th>\nTypical Application<\/th>\nSelection Considerations<\/th>\n<\/tr>\n<\/thead>\n
Ductile iron<\/td>\nGeneral water and wastewater pipelines<\/td>\nInternal and external coating quality is important<\/td>\n<\/tr>\n
\u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0643\u0631\u0628\u0648\u0646\u064a<\/td>\nHigher-pressure water and utility systems<\/td>\nCorrosion allowance and coating must be considered<\/td>\n<\/tr>\n
\u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623<\/td>\nDrinking water and corrosive treatment fluids<\/td>\nChloride concentration and temperature require review<\/td>\n<\/tr>\n
\u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0637\u0628\u0642\u0629<\/td>\nChloride-bearing or demanding water service<\/td>\nGrade, welding and water chemistry must be verified<\/td>\n<\/tr>\n
Lined construction<\/td>\nCorrosive chemical-dosing systems<\/td>\nLining must match the chemical, pressure and temperature<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
\n

Why Are Valve Coatings Important?<\/h2>\n

Ductile-iron and carbon-steel valves commonly use protective
\ncoatings to separate the base metal from water, soil and the
\nsurrounding atmosphere. Coating quality can strongly affect the
\nservice life of a valve.<\/p>\n

Coating selection should consider immersion service, buried
\ninstallation, sunlight, humidity, chemical exposure and drinking
\nwater requirements. Surface preparation, coating thickness,
\nadhesion, edge coverage and holiday inspection should be defined
\nwhen required by the project.<\/p>\n