Grooved Deluge Valve

The ZSFM-G groove dimensions follow the AWWA C606 standard, which is the same standard Victaulic, Anvil/Gruvlok, Shurjoint, and other major coupling manufacturers use. The valve body is dimensionally compatible with all AWWA C606-compliant couplings — including the standard Victaulic Style 005, 75, 77, and 177 couplings commonly specified on commercial fire sprinkler projects.

CA-FIRE can supply the valve with or without couplings included in the package. If your specifying engineer has a preferred brand (commonly Victaulic for international projects, or a regional brand for cost reasons), order the valve body alone and source couplings separately. If you'd prefer single-source supply, CA-FIRE can supply Victaulic-compatible couplings with the valve at competitive pricing.

Note: "Victaulic" is a trademark of Victaulic Company. CA-FIRE's product is described as Victaulic-compatible meaning it conforms to the same AWWA C606 standard and physically fits Victaulic couplings — it is not manufactured by Victaulic Company.

On a per-joint basis, a typical experienced fitter takes:

Flanged joint (DN150): ~90 minutes from "joint ready to install" to "leak-tested and signed off". This includes pipe alignment, gasket placement, bolt insertion, crisscross torquing to spec, and visual inspection.

Grooved joint (DN150): ~25 minutes for the same scope. Slide coupling housing over groove, fit captive gasket, hand-tighten two bolts in alternating turns, final wrench to spec, visual.

For a complete deluge valve station with 8 typical joints (upstream isolation, valve in/out, drain manifold, test, downstream isolation), the difference is ~12 hours flanged vs ~3.5 hours grooved — saving approximately one full working day per station. On a project with 4 valve stations, that's a full week of contractor time. The cost saving depends on local labour rates, but the schedule saving is consistent and often the more valuable consideration for time-driven projects.

The DN80–DN200 range represents the commercial fire sprinkler sweet spot — these are the sizes used for the vast majority of building riser, zone supply, and standpipe deluge applications. The grooved coupling format is most economical and most widely standardised in this size range.

For DN50 and DN65 (small zone branches, foam concentrate lines, drain mains), grooved couplings are available but less common, and CA-FIRE typically supplies these as flanged. If your project specifically requires DN50 or DN65 grooved, contact us — we can arrange a custom-build but lead times are longer.

For DN250, DN300, and DN350 (large fire pump discharge mains, foam-water hangar deluge supply, transformer farm cooling), grooved couplings exist but the cost-benefit shifts as the coupling housings become very large and heavy. Flanged is the standard specification at these sizes, and CA-FIRE manufactures the flanged ZSFM up to DN350.

The grooved end requires a circumferential machined groove in the valve body, which creates a localised stress concentration at the groove root. Standard grey cast iron has lower tensile strength and lower elongation than ductile iron — meaning a grey cast iron groove can be more prone to crack initiation under cyclic pressure, particularly if there's any installation stress on the joint.

Ductile iron (also called nodular iron or spheroidal graphite iron) has approximately 2× the tensile strength and 5–10× the elongation of grey cast iron. The graphite is in spherical (nodular) form rather than flake form, eliminating the stress-concentration effect of flake graphite. This makes ductile iron the correct material for any grooved valve body — the additional cost over grey cast iron is modest (~10–15%), and the safety and durability margin is substantially better.

The flanged ZSFM uses standard grey cast iron because the flange face has uniform stress distribution and no machined notch.

Yes — the ZSFM-G is fully compatible with AFFF and AR-AFFF foam solutions at 3% and 6% application rates. The EPDM diaphragm, the brass/stainless trim, and the ductile iron body with epoxy coating all tolerate foam concentrate exposure without degradation. The grooved coupling gasket itself is also EPDM and is foam-compatible.

Common foam-water applications using the grooved deluge valve: aircraft hangar floor deluge (NFPA 409), helideck foam-water (NFPA 418), flammable-liquid warehouse foam-water spray, and vehicle workshop foam-water systems. For the upstream foam concentrate proportioning, see CA-FIRE's foam bladder tank product line — designed to integrate seamlessly with the deluge valve station downstream.

To prepare an accurate quotation, please provide: (1) nominal size (DN80, DN100, DN150, or DN200) and quantity per size; (2) actuation mode preference — electric solenoid (standard), wet pilot, dry pilot, or specified at site; (3) whether couplings should be included in the package — Victaulic-compatible 2-bolt clamps from CA-FIRE, or valve body only with the contractor sourcing couplings separately; (4) upstream pipework type (carbon steel grooved, ductile iron grooved, or stainless grooved) — affects coupling selection; (5) any certification scope beyond the standard GB 5135.2 — UL-listed and FM-approved variants are available on specification; (6) installation location (indoor / outdoor / sheltered / freezing) — affects trim and accessory specification.

Contact sales@ca-fire.com or WhatsApp +86 18150362095. Quotations typically turn around in 1–2 business days for standard GB-certified scope; 3–5 business days for UL/FM-listed scope.