Wafer Double Disc Dual Plate Check Valve for Marine Product Description Flanges according to ASME B/16.4716.5, Class 125 / 150; DIN 2501, PN10 / PN16 ASME B16.1/B16.2 Size: DN40-DN900/ 1.5"-36" Materials: Body: Cast Iron / Ductile Iron / Cast steel / Stainless steel / Aluminum bronze Disc: Ductile Iron / Stainless steel / Aluminum bronze Spring: Stainless stee(SS304, SS316, Inconel) Stem: Stainless steel Seat: EPDM / NBR / VITON / Stainless steel Working pressure: 1.5"-12" 16 bar; 14"-24" 10 bar/16BAR; 28"-36" max 10 bar Pressure test according to standards: API 598 Availability The check valve is available with: Nominal Diameter DN50 ~ 900 (2 "~ 36"), Nominal Pressure PN10 ~ PN16, flange connection is EN1092-2 PN10,PN16, ANSI CLASS 125/150,JIS 5K and 10K etc. Function and Characters This valve is mainly used for connection and interruption for the media such as water, oil and others in the pipeline. And the main function of this valve is to stop the medium from back off and bleeding from the container. The face to face of this valve is short, as well as with a small volume and light weight. The disc can be closed quickly. It can be used in both horizontal and vertical piping, which is also convenient for installation. With a small fluid resistance, the valve is unimpeded. It is flexible, with good sealing. The structure is simple and compact, and the appearance is beautiful. The service life is long with high reliability. Q: What is your payment term? A: T/T 30% down payment, balance to be paid before shipment. Or L/C. Q: How long is your delivery time? A: Depends on QTY. Q: Are you a manufacturer or trading company? How to reach your company from Beijing? A: We are a well-experienced manufacturer. And it is about 1.5 hours by high speed train from Beijing Nan Station. Q: Do you provide samples? Is it free or charged? A: Yes, we can offer sample free but shipping charges covered by customer. Q: If products have some quality problem, how would you deal with? A: We will responsible for all the quality problems if it is not human causes.