APST
6Pages

Catalog excerpts

ADCA AUTOMATIC PUMP TRAP APST DESCRIPTION The ADCAMat APST automatic pump trap is especially recommended where stall condition may occur due to poor steam trap condensate discharge capacity, caused by temporary insufficient pressure drop. The equipment combines the features of a float steam trap and a pressure operated pump, in one single unit. Whenever the steam trap function is incapable of draining condensate, the pump function is activated (using external steam pressure). The pump replaces the necessary positive pressure to lift the condensate to the return system, before water logging occurs, avoiding water hammer and consequent noise, equipment damage, corrosion, unstable temperature control, etc. MAIN FEATURES High capacity. Hardened stainless steel wear parts. High-endurance inconel springs. Low filling head to minimize installation space. No electric requirements or NPSH issues. Suitable for hazardous environments. Low running costs. No motive or flash steam is lost. Operation under vacuum conditions. OPTIONS: Level gauge. Drain and lift steam condensate from heat exchangers, among others. AVAILABLE MODELS: APSTS – carbon steel. APSTS-HC – carbon steel, high capacity. APSTSS – stainless steel. APSTSS-HC – stainless steel, high capacity. Flanged EN 1092-1 PN 16. Flanged ASME B16.5 Class 150. Female threaded ISO 7 Rp (threaded flanges). Others on request. Horizontal installation in a closed loop system. An example is shown in Fig. 1. See IMI – Installation and maintenance instructions. MOTIVE MEDIUM: Saturated steam. CE MARKING – GROUP 2 (PED – European Directive) VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA LIMITING CONDITIONS Minimum density BODY LIMITING CONDITIONS * 0,80 kg/L Maximum motive pressure Minimum motive pressure Maximum operating temperature Minimum operating temperature Pump discharge per cycle (approx.) Remark: It is recommended that the motive pressure does not exceed 1 to 4 bar above the expected back pressure applied to the pump. FLANGED FLANGED PN 16 CLASS 150 ALLOWABLE ALLOWABLE PRESSURE PRESSURE RELATED TEMP. FLANGED PN 16 / CLASS 150 ALLOWABLE RELATED PRESSURE TEMP. RECEIVER SIZING TABLE FOR EQUALIZED, CLOSED SYSTEM INSTALLATION RECEIVER SIZE (DN) 10000 – – – – –...

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* Dimensions are different if ISO 7 Rp female threaded flanges are requested. ** As standard, in versions manufactured with EN 1092-1 PN 16 flanges, these connections are female threaded ISO 7 Rp. In versions with ASME B16.5 flanges, these connections are female threaded NPT. VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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* Cover gasket Stainless steel / Graphite Stainless steel / Graphite * Outlet cover gasket Stainless steel / Graphite Stainless steel / Graphite * Intake valve/seat assembly Stainless steel Stainless steel * Exhaust valve/seat assembly Stainless steel Stainless steel Lever assembly Stainless steel Stainless steel Stainless steel Stainless steel Spring assembly * Check valve Counter flanges * Steam trap mechanism Stainless steel Stainless steel * Steam trap float Stainless steel Stainless steel Zinc plated steel Zinc plated steel * Available spare parts. VALSTEAM ADCA We reserve the right to...

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ADCA SIZING To accurately size a pump trap, the following information must be provided: 1. Heat exchanger (or process equipment) maximum steam or condensate load, in kg/h. 2. Heat exchanger (or process equipment) operating pressure at full load in bar or, alternatively, the heat exchanger maximum operating pressure in bar and the over design percentage. 3. Motive steam pressure available to operate the pump trap, in bar. 4. The total lift or backpressure in bar the pump will have to overcome. This includes the change in fluid level elevation after the pump (0.0981 bar/m of lift), plus...

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ADCA OPERATION 1. In the first instance, the steam intake valve is closed, while the vent valve is open. As condensate flows into the body through the inlet check valve, the APST can operate in a closed loop application, in one of two ways (as a steam trap or pressure operated pump). 2. If the inlet pressure is greater than the back pressure, the APST works as a steam trap, continuously discharging condensate by differential pressure. At this point the steam intake valve remains closed and the vent valve open. 3. As soon as, e.g., the equipment control valve starts to modulate, the steam...

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APST 6Pages

Catalog excerpts

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APST
6Pages