Call Us
+8618633052223
E-mail
njhdvlz@163.com
English
  • Home
  • Products
  • Wafer Type Check Valve | Non-Slam, Low Pressure Drop

Oct . 27, 2025 12:10 Back to list

Wafer Type Check Valve | Non-Slam, Low Pressure Drop



Why a modern Wafer Type Check Valve keeps showing up on my project specs

Short version: space is expensive, energy is tighter than ever, and nobody likes water hammer. The Series F16 Dual Plate design from Hongda Valve has been popping up in submittals I review, and—honestly—it’s not hard to see why. Dual plates cut pressure drop, the wafer body slips between flanges, and the whole package meets API 594 with inspection/testing to API 598. That’s the boring compliance bit, but it matters when pumps and uptime are on the line.

Wafer Type Check Valve | Non-Slam, Low Pressure Drop

What’s new in the market

Industry trend-wise, compact dual-plate checks are edging out bulky swing checks in HVAC, desalination, and even midstream water injection. Lower mass means less stress on piping. And, surprisingly, many customers say the fast-closing springs noticeably tame surge events. It’s not magic, but it helps.

Quick spec snapshot (Series F16)

Design standard API 594 (dual plate)
Inspection & testing API 598 (shell, seat)
Face-to-face ISO 5752 basic series 16 (wafer long)
Flange compatibility GB / DIN / BS (Series F16). Also available: Series F125
Sizes ≈ DN50–DN600 (real-world availability may vary)
Body materials WCB, CF8, CF8M ≈ (others on request)
Seat options NBR, EPDM, FKM/Viton (temp window depends on media)
Springs Stainless steel or Inconel® (for higher temps)
Cracking pressure ≈ 0.02–0.05 bar (size-dependent)

Where it’s built and how it’s made

Origin: Development area of Huanmadian, NingJin county, Hebei province, China. The production flow is pretty classic, with a few smart touches:

  • Materials: cast carbon steel or stainless body; 2-piece discs; high-resilience elastomer seat.
  • Methods: precision casting, CNC machining, shot blasting, spring-balanced dual plate assembly.
  • Testing: API 598 shell at ≈1.5× rating, seat at ≈1.1×. Hydro + air leakage checks.
  • Service life: lab-cycled to ≈100k–250k operations; field results vary by media and slam conditions.

Applications (and what users say)

  • HVAC/chilled water: fast close-up reduces backflow; maintenance crew likes the slim profile.
  • Desalination/RO: low ΔP through the Wafer Type Check Valve helps pump efficiency.
  • Fire water and irrigation: straightforward install between existing GB/DIN/BS flanges.
  • Refining/chemicals: stainless versions for process media (check compatibility, of course).

Mini case: A Gulf RO plant swapped swing checks for Wafer Type Check Valve units on DN250 lines; recorded ≈8–12% reduction in pump energy (ΔP drop) and fewer nuisance hammer events per month. Another job in a high-rise HVAC loop saw simpler commissioning—less chasing of reverse spin alarms.

Vendor snapshot (what differs, in practice)

Vendor Standards Lead time Customization Notes
Hongda (Series F16/F125) API 594 / API 598; ISO 5752 ≈2–6 weeks Seats, springs, materials Good GB/DIN/BS flange fit, pragmatic pricing
Brand A API 594 / 598 ≈4–10 weeks Limited options Strong global stocking
Brand B API 594; EN variants ≈3–8 weeks Coatings, exotic alloys Price premium in some regions

Customization checklist

  • Seat material by media (EPDM for water, FKM for hydrocarbons, etc.).
  • Spring metallurgy for temperature and corrosion class.
  • Coatings (e.g., epoxy) and NACE-related materials on request.
  • Tagging, MTRs, hydro test reports, and third-party inspection if needed.

Test data, install tips, and paperwork

  • Seat leakage: API 598 zero visible leakage on water/air for resilient-seated units.
  • Pressure drop: at water 3 m/s, DN200 shows ≈0.05–0.08 bar (indicative).
  • Install vertically (flow up) or horizontally; keep discs aligned with flow. Avoid pulsation near pump discharge if you can.
  • Certs: API/ISO compliance statements; material certificates; test reports.

In fact, the biggest “aha” is mundane: a Wafer Type Check Valve that just fits, seals, and saves a few kilopascals—over a year, that’s real money on pump curves.

Authoritative references

  1. API 594: Check Valves—Flanged, Lug, Wafer
  2. API 598: Valve Inspection and Testing
  3. ISO 5752: Metal valves—Face-to-face and center-to-face dimensions
  4. EN 1092-1: Flanges (DIN/BS alignment context)

Next：

Latest news

If you are interested in our products, you can choose to leave your information here, and we will be in touch with you shortly.


Hit enter to search or ESC to close