Gate Valve Manufacturer: How to Vet a Factory

Three quotes for the same 1/2 inch gate valve arrive: one cites API 600, one cites EN 1171, one cites nothing. None of the three is telling you whether it makes the valve.

A gate valve manufacturer worth shortlisting does three things a trader rarely does. It names the product standard that actually governs the valve family you are buying (for threaded brass that is EN 12288:2010 or MSS SP-80-2019, not API 600). It runs the ISO 5208:2015 shell test and low-pressure gas closure test on every valve and will put that on the purchase order. And it states MOQ, lead time and sample terms in writing, per size.

It helps to see what a hydrostatic pressure test on a gate valve looks like on the bench before you write one into a purchase order.

▶  Play

Which Standard Should a Gate Valve Quote Cite?

Start with the valve family, then check the standard against it. Most mismatched quotes fail here, before price is even discussed. A supplier who lists every standard it has heard of, whatever the body material, is usually reselling a catalogue it did not write.

The decision is short. Brass or bronze threaded valve: expect EN 12288:2010 or MSS SP-80-2019, plus the potable-water approval of your market. Buried waterworks valve: a ductile or cast iron maker, flanged, with EN 1171:2015 or the local waterworks standard. Refinery or gas service: a steel valve maker with API 600 or API 602. Choosing the valve type itself is a separate question, covered in our gate valve specification guide.

The Factory Tests to Put on the Purchase Order

ISO 5208:2015, last reviewed and confirmed by ISO in 2025, sets the pressure tests for metallic valves. For a gate valve up to DN100 (4 inch) at PN 250 / Class 1500 or below, its Table 1 requires two tests on every unit: a shell test with liquid, and a closure test with low-pressure gas. The high-pressure liquid closure test is optional unless your order names it. At DN50 and below each test runs a minimum of 15 s; from DN65 to DN150 it is 60 s.

Two clauses decide whether you ever see the result. The manufacturer owes a certificate of compliance only when the procurement document specifies one (clause 4.13), and a purchaser who wants to witness testing gets at least five working days’ notice. So the order should say, in one line, which standard, which leakage rate, and that a certificate is required per batch. EN 12266-1:2012 is the European twin for PN-rated valves, and API 598 (11th edition, 2023) is the Class-rated equivalent. Our ISO 5208 leakage rate guide gives the exact wording.

IFAN states that every production batch is hydrostatically tested in its CNAS-accredited laboratory. It does not publish which ISO 5208 leakage rate its brass gate valves are released to, so ask for that in writing, as you should from any maker.

Five Checks That Separate a Gate Valve Factory From a Trader

1. Forming process. A factory can say whether each size is forged or cast, and where the forging happens. A trader answers “high quality brass”.
2. Alloy on paper. The material certificate should name the grade, such as CW617N, and not just “brass”. See our note on CW617N and lead-free brass.
3. Weight per size. Ask for grams per piece. IFAN’s 81300 gate valve weighs 217 g at 1/2 inch, 322 g at 3/4 inch and 509 g at 1 inch, so the 1 inch body carries 2.3 times the brass of the 1/2 inch. A price list that does not climb roughly with weight suggests a lighter body somewhere.
4. Batch-numbered test record. A factory can show which batch was shell and seat tested, and on which bench. A trader forwards a generic certificate.
5. Packing data. Pieces per carton and cubic metres per carton come from the packing line. IFAN publishes 100, 80 and 50 pieces per carton for the three sizes, at 0.02 CBM each.

A supplier who cannot answer checks 3 and 5 within a day is probably not holding the product in its own warehouse. If you have the answers from two makers and want a third set to compare, send the size list on WhatsApp.

MOQ, Lead Time and Samples: What to Ask Before You Order

These three answers decide whether a quote is usable, and they vary more between makers than price does. Ask them per size, in writing.

MOQ. Makers that stock brass valves can sell below a container. IFAN sets no minimum order on its stocked brass valve range. Private-label or OEM orders are different: IFAN’s OEM minimum is one container, mixable across sizes and with pipe in the same load.

Lead time. IFAN quotes about 10 days for the stocked brass valve range, against 45 days for its made-to-order extrusion lines. With any maker, the time grows when the order needs new forging dies, a thread standard not in stock (NPT instead of BSP), custom marking, or a market approval the maker does not already hold.

Samples and price. Weigh the pre-order sample, gauge the threads, and pressure-test it yourself before the bulk order. Then compare quotes per piece and per size on the same Incoterm, because weight, alloy, forged or cast body, testing and packing make up the price. The gate valve price benchmark breaks down the metal share.

Where IFAN Fits, and Where We Stop

IFAN makes brass gate valves from DN15 to DN50 (1/2 to 2 inch) with BSP or NPT threaded ends, in CW617N, with forged and cast bodies, plus a PP-R gate valve from DN20 to DN32. The brass range carries CE, ACS, WRAS and SASO approvals under ISO 9001:2015. Details are on the brass valve range page and in the brass gate valve guide.

IFAN does not make steel gate valves to API 600 or API 602, or flanged iron gate valves to EN 1171 or waterworks standards. For refinery, gas or buried mains, shortlist a steel or ductile iron specialist and use Table 1 to check what it cites.

Conclusion

Before the first email, have five things ready. List sizes and quantity per size, and the thread standard. Name the product standard you expect: EN 12288:2010 or MSS SP-80-2019 for brass. State the ISO 5208 tests and certificate you require, liquid shell and low-pressure gas closure at 15 s each up to DN50. Add the approval your market needs, such as WRAS for the UK or ACS for France. Send that list to every shortlisted maker, and compare the answers per size, not the adjectives.

Frequently Asked Questions