Industriearmaturen Lift Check Valves

Lift Check Valves in Steel, Stainless Steel & Cast Iron

Lift check valves in cast steel, stainless steel 1.4408 or spheroidal cast iron, spring-loaded piston design, DN15 to DN100, PN10 to PN40, temperatures up to +450 °C.

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DN15 – DN250

Nominal size range

PN10 – PN40

Pressure ratings

+450 °C Temp

Max. operating temp

Flanged check valve type RV430

Sizes: DN15 – DN100

Flange connection: PN40

Face-to-face: Face-to-face according to EN 558-1, series 1

Case & Lid: Steel 1.0619 (A216 WCB)

Product Overview

Lift Check Valves: Spring-Loaded Backflow Prevention for High Pressure and High Temperature

A lift check valve — also called a piston check valve — uses a disc cone that lifts vertically along the flow axis against a return spring. Forward flow raises the cone off its metal seat; as soon as the flow drops below the spring force, the cone descends before backflow can develop. Consequently the axial piston travel closes faster and more repeatably than any hinged flap, and the metallic seat withstands thermal cycling and high pressure far better than an elastomer soft-seat. This makes the lift check valve the default choice for steam service, hot water, thermal oil and any high-pressure duty where a soft-seated design would fail early.

Fergo supplies four series: the cast steel RV430 for steam and hot water up to +400 °C, the stainless steel RV450 for acids, chemicals and chlorinated water up to +450 °C, the grey cast iron ZV116 for water, air and oil at PN16, and the spheroidal cast iron ZV216 for the same duties at PN25 and up to +350 °C. All four are spring-loaded and follow the face-to-face length of EN 558-1 Series 1. The steel-bodied RV430 and RV450 use EN 1092-1 Type B1 flanges, while the cast iron ZV116 and ZV216 use EN 1092-2 with a coarse sealing strip or a raised face Type B1.

Lift check valves protect boilers, pumps, compressors, heat exchangers and pressure vessels across power generation, district heating, refineries, chemical processing, food production and HVAC installations. Because the piston travels vertically along the spring, the valve works in any installation position — vertical, horizontal or inclined — provided the flow arrow points in the correct direction. Where lower cracking pressures or larger nominal sizes are required, the wafer and dual plate check valve ranges cover from DN25 upwards, and for the shortest possible face-to-face length the disc check valve range provides the compact spring-loaded alternative.

Subcategories: Lift Check Valves by Body Material

01 RV430 — Cast Steel Lift Check Valve (Steam & Hot Water)

The RV430 cast steel lift check valve combines a body and cover in steel 1.0619 with a disc cone in 13Cr, a stainless steel SS304 spring and a graphite + SS304 cover gasket. The operating temperature range covers −10 °C to +400 °C, and pressure ratings run from PN10 through PN16 to PN40 with flange connections to EN 1092-1 Type B1. Sizes span DN15 upwards. The RV430 is the primary specification for steam headers, condensate return lines, hot water risers and any thermal service where soft seats reach their limits.

02 RV450 — Stainless Steel Lift Check Valve (Chemical & Acid Service)

The RV450 stainless steel lift check valve uses a body and cover in 1.4408 / CF8M, a disc in F316 / 1.4401, a spring in SS316 and a cover gasket of SS304 + graphite. The corrosion-resistant construction handles acids, alkalis, chlorinated water and marine service, and the operating temperature envelope reaches +450 °C — higher than any elastomer-seated check valve can serve. Flange dimensions follow EN 1092-1 Type B1 with pressure ratings from PN10 up to PN40, and face-to-face lengths conform to EN 558-1 Series 1.

03 ZV116 — Grey Cast Iron Lift Check Valve (Water, Air, Oil)

The ZV116 grey cast iron lift check valve uses a body in EN-JL1040 with a disc cone in stainless steel 1.4028, a seat in 1.4006, a spring in 1.4057 and a graphite cover gasket. This is the economical choice for water supply, compressed air, non-aggressive oils and general utility pipework at PN16. Sizes range from DN20 through DN32 and DN50 up to DN100 (K-factor 7.4 m³/h at DN20, 18 m³/h at DN32, 41 m³/h at DN50 and 181 m³/h at DN100). Flange drilling follows EN 1092-2 Type B1 with a coarse sealing strip, and the operating envelope covers +2 °C to +300 °C.

04 ZV216 — Spheroidal Cast Iron Lift Check Valve (PN25, +350 °C)

The ZV216 spheroidal cast iron lift check valve upgrades the grey iron body to ductile iron GGG40.3 (EN-JS1025), which raises the pressure rating to PN25 and the temperature envelope to +350 °C. Internal materials mirror the ZV116: disc cone in 1.4028, seat in 1.4006, spring in 1.4057 and a graphite cover gasket. Flange connections follow EN 1092-2 with a raised face Type B1. This variant fits between the economical ZV116 and the steel-bodied RV430 where higher pressure or elevated temperature exceeds grey cast iron limits but a full cast steel body is not yet justified.

Materials in Detail: Specifying the Right Lift Check Valve

Body Materials

1. Cast Steel 1.0619 (RV430)

Application: steam headers, condensate return lines, hot water, thermal oil, refinery utilities and any high-pressure high-temperature service that a cast iron body cannot handle

Temperature: −10 °C to +400 °C · PN10, PN16, PN40

Advantages: high mechanical strength and creep resistance at elevated temperatures, proven cast-steel grade for steam service, wide pressure envelope, weldable for pipework integration

Limitations: no inherent corrosion resistance — unsuitable for acids, alkalis or chloride-rich water without additional protection

2. Stainless Steel 1.4408 / CF8M (RV450)

Application: chemical and petrochemical processing, food and beverage plants, chlorinated water, seawater, high-temperature acid service, oxygen service after cleaning

Temperature: −10 °C to +450 °C · PN10 to PN40

Advantages: molybdenum content resists pitting and crevice corrosion, no metal-ion pickup into the medium, hygienic surface, the widest temperature envelope in the lift check valve family, single-material construction across body, cover, disc and spring

Limitations: higher material cost than cast steel or cast iron; not resistant to hydrofluoric acid

3. Grey Cast Iron EN-JL1040 (ZV116)

Application: water supply, compressed air, non-aggressive mineral oils, condensate lines at moderate pressure, HVAC circuits and general utility pipework

Temperature: +2 °C to +300 °C · PN16

Advantages: economical body material for large bores, good vibration damping and thermal stability, proven grey iron grade for water and steam-condensate service, extensive Kvs data available for hydraulic sizing

Limitations: lower tensile strength and lower impact resistance than ductile iron; unsuitable for aggressive chemicals, thermal shock or pressure surges beyond PN16

4. Spheroidal Cast Iron GGG40.3 / EN-JS1025 (ZV216)

Application: pump discharge in water utilities and HVAC, higher-pressure oil and air service, applications that require a step above grey cast iron but do not yet justify cast steel

Temperature: +2 °C to +350 °C · PN25

Advantages: significantly higher tensile strength and impact resistance than grey cast iron, higher pressure and temperature envelope, better resistance to thermal shock while still economical compared with cast steel

Limitations: not corrosion-resistant on its own — specify RV450 stainless steel for aggressive media

Disc, Seat and Spring Materials

1. Disc Cones — 13Cr, F316 and Stainless Steel 1.4028

Application: the disc cone is the moving element that lifts vertically along the spring; 13Cr in the RV430, F316 (1.4401) in the RV450, and 1.4028 in both ZV116 and ZV216

Temperature: matches the body envelope up to +450 °C on the F316 variant

Advantages: hardened stainless grades resist erosion at the seat contact line, dimensionally stable under repeated impact loading, precise cone geometry ensures reliable seat closure and minimises leakage past the metal seat

Limitations: metal-to-metal sealing is not bubble-tight; if zero-leakage shut-off is required, specify a soft-seated design instead

2. Seats and Springs — Stainless Steel 1.4006, 1.4057, SS304, SS316

Application: the metallic seat is machined or inserted into the body; the return spring provides the closing force in every series

Temperature: matches the body envelope

Advantages: the metal seat withstands thermal cycling and pressure surges without ageing, the stainless steel spring keeps its rate over long service, corrosion-resistant internals extend service life across all body variants including grey cast iron and cast steel

Limitations: the spring adds a defined cracking pressure that must be factored into pump-sizing at low differential pressure

Fergo lift check valves comply with the Pressure Equipment Directive 2014/68/EU and carry the CE mark. Flange dimensions follow DIN EN 1092-1 Type B1 for the cast steel RV430 and stainless steel RV450, and EN 1092-2 Type B1 for the grey cast iron ZV116 (coarse sealing strip) and spheroidal cast iron ZV216 (raised face). Face-to-face lengths across the family conform to EN 558-1 Series 1, so a lift check valve of any series replaces an existing piston check valve of the same nominal size without pipework modification. Kvs values for hydraulic sizing are published per size in the product datasheet — for example 7.4 m³/h at DN20, 18 m³/h at DN32, 30 m³/h at DN40 and 181 m³/h at DN100 on the ZV116.

Spring-loaded axial-piston check valves fall within the scope of MSS SP-125, the US industry standard for silent check valves that specifies design, materials and testing requirements for spring-actuated backflow prevention — the lift check valve family follows the same silent-close principle. Inspection documents to EN 10204 — the type 2.2 works certificate or the type 3.1 inspection certificate — are available on request, and Positive Material Identification (PMI) reports can be supplied for steam and thermal-oil service. A full overview of all certificates is published on the Fergo certificate page. You can verify seat and body compatibility with your medium beforehand using the Fergo resistance check.

Fergo holds more than 25,000 industrial valves in stock. Lift check valves in the cast steel RV430, stainless steel RV450, grey cast iron ZV116 and spheroidal cast iron ZV216 series are available in every common nominal size from DN15 to DN100, and pressure ratings from PN10 through PN40. Because every series shares the EN 558-1 Series 1 face-to-face length, a piston check valve of any body material replaces its predecessor in a single bolted operation. Orders are picked the same working day, so most stock items reach you within two to five working days.

Fergo ships across Europe — including the United Kingdom, the Nordic countries and all other EU member states. Smaller lift check valves travel by parcel service, whereas heavier flanged bodies and consolidated shipments go by forwarding agent. Express shipping delivers within the next working days. You will find shipping costs, payment options and express terms on the shipping and payment terms page. For special alloys, non-standard cracking pressures, oxygen-service preparation or complete steam-header packages, please contact us through the customised solutions section.