Piston check valves Z15.1, Z15.2
High pressure piston check valves, Z15.1 without a spring, Z15.2 with a spring, threaded bonnet, sizes from DN10 to DN65, pressure up to PN400, working temperature up to 650°C, according to the requirements of the European Directive 2014/68/EU for pressure equipment.
Application
- Working medium: water, water steam (overheated steam) and other non aggressive liquids and gasses.
- Application: energy and chemical industry.
- Z15.1 - for horizontal installation.
- Z15.2 - for vertical installation.
Technical description
- The piston check valves Z15.1, Z15.2 are constructed with a monolithic body, inside which is located the closing piston (plunger).
- The body is made of forging, the bonnet of rolled bar.
- The seats of body and closing piston are welded with wear-resistant hard alloy material (type Stellite 6).
- The piston is is made of stainless corrosion-resistant steel grade W№1.4541 / X6CrNiTi18-10.
- The connection of the piston check valves is according to EN, DIN, ANSI (ASME), GOST implemented by:
- butt weld type „BW”;
- welding type SW;
- with flanged ends;
- with threaded ends. - The control of the welded joints is performed by ultrasonic or X-ray analysis.
- The operation of piston check valves Z15.1 and Z15.2 is automatic.
- The tests of the piston check valves are carried out in accordance with EN12266-1,2 or according to the working conditions and customer’s requirements.
- Piston check valve Z15.1 is installed in horizontal position, and piston check valve Z15.2 is installed in vertical position (angle) position.
- The installation must comply with the marking (arrow) indicating the direction of the fluid (working medium).
- Repairable shape of body seat, without dismounting from the pipeline.
- Monolithic stainless steel closing piston for wear resistance and corrosion resistance.
- Unified design providing the possibility of less costs for spare parts by combining four sizes of forgings into eight nominal valve sizes, providing shortened delivery times at competitive prices.
- Possibility for production with non-standard construction lengths by means of extensions and inspection of the welding seams with X-ray analysis.
- Production of ends connections according to the customer’s request.
- Permanent stock availability of spare parts.