When comparing prices, you must look beyond the initial cost and evaluate material composition (e.g., Ductile Iron, Stainless Steel 304/316, or Brass), nominal pressure ratings (PN16, PN25, or ANSI 150/300), and adjustment ranges. A lower price often indicates a lack of pilot-operated precision or inferior diaphragm materials (EPDM vs. NBR), which affects the valve's sensitivity and lifespan. Ensure the quote includes the bore size (DN) and connection type (Flanged, Threaded, or Welded) to avoid compatibility surcharges later.