High Temperature Ball Valves – Erreesse Srl Valves

High Temperature Ball Valves

Heating to boiling points, catalytic and hydro-treatments are some of the refining processes necessary to separate crude oil into storable fractions like marketable oils and condensate; most of these processes at high temperature, from 121°C to 1100°C (249,8°C to 2012°F). Erreesse can provide valves engineered to withstand and exceed high temperature applications with specific constructions and duly selected materials also suitable for geothermal applications, where the direct use of steam, hot water, with abrasive and highly corrosive chemicals and minerals could foul, erode, and damage standard equipment, offering unique features that make them an excellent choice for hot water (geothermal brine) and similar services.

This application can exist in combination with other service conditions, including corrosive & dirty applications with toxic substances, flammable liquids (LNG, LPG or NGL condensate) or generic hydrocarbon gas in high pressure or cryogenic applications.

-Design temperature from 121° to 200°C (249,8° to 392°F)

Ball valves for this temperature range can have soft seated construction with thermoplastic inserts (Devlon V, Nylon, RPTFE, PEEK) and elastomer seals O-ring (FKM, FFKM, HNBR, EPDM, FEPM); material construction does not require any particular care: carbon steel and stainless steel bodies and closures are acceptable, if suitable to other service conditions and pressure ratings. To prevent galling of the substrate the PMSS (Primary Metal Secondary Soft) is a possible construction provided by ENP or metal seated coating on ball to maintain a differential hardness between the ball itself and seat ring.

-Design temperature from 201° to 350°C (393,8° to 662°F)

Ball valves for this temperature range should have metal seated construction with Tungsten or Chrome Carbide coating (from 150µm to 400µm) on ball and seats sealing surfaces with graphite packing and suitable stem extension; the use thermoplastic and elastomer compounds like PEEK and FFKM should be limited to temperature below 250°C and low pressures; carbon steel and stainless steel materials, specific for high temperature conditions, should be selected for pressure containing and controlling parts; materials with good strength properties like 17-4PH, XM19 or in some cases Inconel 625 and 718 for ball, seat rings and stem, are recommended in case of combination with other service conditions like high pressure and corrosive & dirty applications.

-Design temperature from 351° to 550°C (663,8° to 1022°F)

Ball valves for this temperature range must have metal seated construction with Chrome Carbide coating (from 150µm to 400µm) or Stellite coating on ball and seats sealing surfaces with graphite packing and suitable stem extension; difference between the hardness of the seat and the ball is necessary to avoid galling; stainless steel (specific for high temperature conditions) for body and closures and Inconel 625 or Inconel 718 as trim or at least as stem material are strictly recommended for a suitable valve construction.

-Design temperature from 551° to 1100°C (1023,8° to 2012°F)

Ball valves for this extreme temperature range must have metal seated special construction with Stellite coating, graphite packing and suitable stem extension; specific alloys for high temperature conditions must be selected for a suitable valve construction.