Short guides for engineers and buyers
Practical answers to the questions that come up when specifying and buying valves and piping materials in Pakistan. More are added as we write them; the interactive Valve Lab shows how each valve type works.
Gate valve vs globe valve: which should you specify?
Gate valve or globe valve? When each is the right choice, how they differ in pressure drop, throttling, cost and maintenance, and what to write on the RFQ. A practical guide from AM Enterprises, Karachi.
EN 10204 3.1 vs 3.2: which certificate does your tender need?
What an EN 10204 3.1 material test certificate contains, how 3.2 differs, when Pakistani tenders require each, and what makes an MTC acceptable to an inspector. A guide from AM Enterprises, Karachi.
How gate, globe, ball, butterfly and check valves work
Interactive cross-sections: move the handle and watch the flow change, with the standards and brands for each type.
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