API · ASME · DIN · EN 표준 산업용 밸브

풋 밸브

풋 밸브는 흡입 라인 취입부에 설치되는 체크 밸브로, 펌프 정지 시 물기둥의 배류를 막아 프라이밍을 유지하고, 내부 스트레이너 메시가 임펠러로 이물이 들어가지 않게 합니다. 사이즈는 PN 16 / Class 150에서 DN 50~DN 300으로, 주철·구상주철·SS304·SS316 바디, 탄소강·스테인리스·SS304·SS316 디스크, F304/F316 시트, SS304 스트레이너 메시를 제공하고, 소구경 황동 PN10 사양(나사 또는 실린더형)이 생활 급수 및 난방 용도를 커버합니다. 대표적인 상수도 구성은 80마이크론 에폭시 코팅 EN-GJL-250 주철 바디, 스테인리스 액시얼 디스크 및 스프링, EPDM 시트, 아연도금 강재 스트레이너, 플랜지 PN16 RF DN50~DN250으로, 16 bar에서 -10~110°C 정격, 약 0.3 bar에서 개방하며 유로 방향 화살표가 흐름 경로를 표시하는 수직 설치용으로 지정됩니다. 메시 조밀도는 원수에 따릅니다 — 우물에는 조밀한 메시, 깨끗한 취수에는 개방 메시 또는 천공관. 형식별 고장 경로는 프라이밍 상실로 나타나는 시트 누출 또는 흡입관 공기 누출, 저유량으로 나타나는 스트레이너 막힘, 오염 유체에 의한 고무-금속 시트 오염이며, 굽음 및 펌프에서 약 10배 관경 떨어져 설치하고, 침수 서비스에는 데이터시트, 시험 성적서, 재질 증명서, 유동 방향 표시를 중요한 문서로 취급합니다.

다음 패밀리에 속함: 체크 밸브 패밀리

최종 업데이트: 2026-11

견적 요청

패밀리 사양

Nominal valve connection size	DN50 to DN300
Pressure class / nominal rating designation	PN16, Class150
Valve body material	Cast Iron, Ductile Iron, SS304, SS316
Disc Materials	Carbon Steel, Stainless Steel, SS304, SS316
Seat material	F304, F316
End connection types	Flanged
Operation / closure mode	Self-acting (automatic)
mesh material	SS304
Materials (component scope as published)	Cast Iron, Ductile Iron, SS304, SS316
function definition	A foot valve is a non-return valve installed at a pump suction or the bottom of a pipeline so water cannot flow backward when the pump stops; on the referenced execution an axial stainless disc with spring does the closing.
priming mechanism	Priming works because the spring-assisted check closes on a pressure continuum the moment the pump stops, trapping the liquid column in the pipe before backflow starts - without that trapped liquid most pumps cannot rebuild suction and can run dry.
strainer jamming risk	Using a bare check valve without the strainer risks debris lodging the closure member open - the liquid then drains back, and the same debris can travel downstream and damage the pump.
mesh selection	Mesh tightness follows the water source: wells with fine particulates need a fairly tight mesh, while clean draws can run an open mesh or even a perforated-pipe strainer.
pn16 execution envelope	A representative PN16 execution: EN-GJL-250 cast iron body with epoxy coating, stainless steel disc and spring, EPDM seat, galvanized carbon steel strainer, flanged PN16 RF, DN50-DN250, -10 to 110 C at 16 bar.
opening pressure	Opening pressure on the referenced spring execution is about 0.3 bar, sized to open under pump suction yet reseat promptly at shutdown, with low head loss through the trim.
coating spec	Corrosion protection on the referenced water-works execution is epoxy blue RAL 5005 at 80 microns, internal and external.
vertical orientation	The flanged PN16 execution is specified for vertical installation, with the flow-direction arrow on the body marking the permitted flow path.
brass pn10 variant	Small-diameter executions extend to brass: PN10 brass foot valves with strainer in threaded or cylindrical patterns alongside cast iron flanged PN16 bodies, covering domestic water, heating and air-conditioning plants.
installation clearance	Placement rule from the referenced maker: near bends and circulation pumps the valve must sit at a distance of about 10 pipe diameters, with pipes correctly aligned and thread sealant kept off the rubber-metal sealing zone.
fluid cleanliness limit	Rubber-metal sealing is the soft spot: dirt, dust or excessive water hardness reaching the seat area compromises sealing, so such media must be removed or filtered upstream.
check vs foot scope	Scope note: every foot valve is a check valve, but the job is narrower - hold the suction column and screen debris at the submerged inlet - while a general check valve is placed anywhere reverse flow must stop.
submerged access penalty	The failure modes concentrate where access is worst: a submerged foot valve that is hard to remove is cheap to buy but expensive to clean, and seat leakage, strainer clogging or an air leak in the suction pipe each present as loss of prime.
loss of prime symptoms	Loss of prime after shutdown points at seat leakage or a suction-pipe air leak rather than automatically at the foot valve - seat condition, pipe joints and suction-lift height should be checked together.
standards document expectation	Documentation that matters more than a standards list for this duty: datasheet, pressure test report, material certificate, flow-direction marking and a maintenance note covering the submerged installation.
selection frame	Selection turns on suction lift, debris load, pressure loss, closing speed and maintenance access: flooded suction may not need a submerged valve at all, while suction lift from sump, tank, reservoir or well depends on the intake valve to keep the line full.
mesh	SS304
carbon steel materials	Carbon Steel: WCB (ASTM A216) — General water and utility pumping
low temp carbon steel materials	Low Temperature Carbon Steel: LCB, LCC (ASTM A352) — Cold water and low-temperature service
alloy steel materials	Alloy Steel: F11, F22 (ASTM A182) — High-pressure pumping and industrial service
stainless steel materials	Stainless Steel: CF8, CF8M (ASTM A351) — Corrosive water and chemical service; Stainless Steel: F316, F316L (ASTM A182) — Aggressive water and coastal applications
duplex stainless steel materials	Duplex Stainless Steel: F51 (2205) (ASTM A182) — Chloride-rich and high-strength service
super duplex stainless steel materials	Super Duplex Stainless Steel: F53, F55 (2507) (ASTM A182) — Offshore and severe corrosion service
aluminium bronze materials	Aluminium Bronze: C95400, C95800 (ASTM B148) — Marine, seawater, and raw water intakes
nickel alloy materials	Nickel Alloys: nickel-chromium alloy 625, nickel-copper alloy 400 (ASTM B564) — Severe corrosion and special pumping service
industries served	Water supply systems – well pumps and suction lines, Irrigation networks – canal and sump pumping, Fire protection systems – suction lines and reservoirs, Industrial utilities – cooling water and process pumping, Marine and offshore – seawater intakes and bilge systems, Wastewater treatment – lift stations and raw sewage pumping
selection factors	Suction pipe diameter and orientation, Vertical lift and static head, Required opening pressure and flow rate, Type and size of debris present, Screen open area and blockage risk, Installation depth and accessibility, Maintenance and cleaning frequency

범위·출처 비고

size envelope	Size envelope: tenant band DN50-DN300 exceeds the referenced PN16 flanged execution DN50-DN250 - the top of the tenant band relies on other OEM executions (e.g. cast iron flanged PN16 larger bodies) not evidenced in this round.
seat material split	Seat material split: existing trim list is F304/F316 metal seats, while the referenced water-works execution seals on EPDM with a rubber-metal seat pairing - both executions exist; elastomer selection sets the temperature ceiling (-10 to 110 C on the EPDM build).
mesh guidance	Mesh guidance: tight-mesh recommendation for wells vs open mesh/perforated pipe for clean draws - strainer choice is media-dependent, not a single catalogue setting.