VPC26
5Pages

Catalog excerpts

ADCA TDS BLOWDOWN CONTROL VALVES VPC26 DESCRIPTION When a steam boiler is in operation there is continuous evaporation of boiler water which causes an undesirable increase in TDS (Total Dissolved Solids) concentration. A typical problem that results from this is water foaming, which leads to reduced boiler performance and wet steam. Furthermore, dissolved and suspended solids will carry over into the steam lines, contaminating valves, tubes, heat exchangers and steam traps, leading to corrosion, scaling and erosion. For these reasons, a certain amount of boiler water must be discharged continuously or periodically to ensure TDS concentration is kept within the recommended parameters. The ADCATrol VPC26 is a control valve specially designed for this purpose and features a multi-stage trim to progressively reduce the energy of the fluid. This makes it ideal for discharge of boiler blowdown at high differential pressures where flashing is a concern. The valve is suitable for both continuous and on/off TDS control via a PA series reverse action pneumatic actuator or AV series fail-safe spring return actuator. MAIN FEATURES Minimized vibrations due to continuous stem guiding. Seat and plug sealing surfaces are protected fom erosion at low stroke positions. Compact and modular design. Multi stage trim for controlled velocity and pressure drop. Hardened stainless steel trim with stellite faced plug and seat. Tool-free quick exchangeable clamped-in seats, allowing fast and easy inline maintenance procedures. OPTIONS AND ACCESSORIES: AVAILABLE MODELS: Sample valve bottom connection. NV400B sample valve. Blowdown controllers. TDS probes. TDS blowdown control in steam boilers and other applications with high pressure drops and low flow rates where cavitation and flashing phenomenon are likely to occur. VPC26S – carbon steel. VPC26i – stainless steel. Flanged EN 1092-1 PN 40. Flanged ASME B16.5 Class 300. AVAILABLE ACTUATORS: PA10 linear pneumatic actuator. AVF234S linear electric actuator. VALSTEAM ADCA CE MARKING – GROUP 2 (PED – European Directive) PN 40 We reserve the right to change the design and material of this product without notice.

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ADCA BODY LIMITING CONDITIONS VPC26S FLANGED PN 40 * ALLOWABLE RELATED PRESSURE TEMPERATURE VPC26i FLANGED CLASS 300 ** ALLOWABLE RELATED PRESSURE TEMPERATURE FLANGED PN 40 * ALLOWABLE RELATED PRESSURE TEMPERATURE * Rating according to EN 1092-1:2018; ** Rating according to EN 1759-1:2004. STEM SEALING FLOW RATE COEFFICIENTS (m³/h) VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA DIMENSIONS (mm) SIZE * With welded-on flanges. ** As standard, in versions with EN flanges, this connection is female threaded ISO 228. In versions with ASME flanges, this connection is female threaded NPT. WEIGHTS (kg) SIZE 1/2" – DN 15 DIMENSIONS – PA SERIES PNEUMATIC ACTUATORS (mm) For more information, please consult IS 3.05 – PA Linear pneumatic actuators. DIMENSIONS – AV SERIES ELECTRIC ACTUATORS (mm) For more information, please consult IS 3.74 – AVM234S-AVF234S Linear electric actuators. DIMENSIONS – NV400B SAMPLE VALVE (mm) For more information, please consult IS 4.90 – NV400...

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PTFE/GR V-Rings (V1.2) MATERIALS * Seat gasket Stainless steel / Graphite AISI 316L / 1.4404 stellite faced Lower guide sleeve Hardened stainless steel Intermediate guide sleeve Hardened stainless steel Upper guide sleeve Hardened stainless steel * Valve plug AISI 316L / 1.4404 stellite faced Stainless steel / Graphite * Scraper ring * Plain bearing Bronze / PTFE PTFE; Graphite filled PTFE Stem guide Stainless steel filled PTFE * Available spare parts. VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA ORDERING CODES VPC26 a) Valve model TDS blowdown control valve, two way, straight body Valve series Series 1 Body material A216 WCB / 1.0619 carbon steel Valve without sample valve bottom connection Valve with sample valve bottom connection and plug Stem sealing PTFE/GR V-Rings (V1.2) Flow rate coefficient Kvs 1,2 (available only for 1/2" to 1" and DN 15 to DN 25) Flanged ASME B16.5 Class 300 11/2" or DN 40 Special construction / Additional points Full description or additional codes have to be added in case of a non-standard combination a) Codification for valve only. For actuator...

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VPC26 5Pages

Catalog excerpts

All VALSTEAM ADCA Engineering S.A. catalogs and technical brochures

VPC26
5Pages