Drawing set index · six valve families
Our products: the six families.
Every valve NF Teguh quotes belongs to one of six patterns. Each has its own sheet; this page is the index.
NF Teguh stocks and supplies six valve families: gate, globe, ball, plug, butterfly and check. Each family page explains how the pattern works, where it fits, and what the enquiry should state. Send your valve list by phone, email or WhatsApp; the counter quotes from stock or against your specification.
The six families at a glance
Six cutaways, six duties. The drawings below are the sections used across this site: red marks the seats, blue the flow. Open a family’s sheet for how the pattern works and what its enquiry should state.
Gate valve
Isolation only, never throttle. K ≈ 0.15
02 · GLOBEGlobe valve
Throttling and regulation off a seat. K ≈ 6
03 · BALLBall valve
Fast quarter-turn isolation, tight shutoff. K ≈ 0.05
04 · PLUGPlug valve
Isolation, diverting and dirty service. K ≈ 0.3
05 · BUTTERFLYButterfly valve
Large bore, low weight, coarse control. K ≈ 0.45
06 · CHECKCheck valve
Stops reverse flow, no operator at all. K ≈ 2
K = typical resistance coefficient, fully open. Order-of-magnitude reference only. Confirm against the manufacturer’s published data for the size and trim quoted.
Choosing a family by duty
Start from what the line must do, not from a catalogue. Positive shutoff on a line that is otherwise always open points to a gate valve; regulating flow points to a globe valve, and the trade is set out in gate valve vs globe valve. Fast quarter-turn shutoff with a tight seal is ball valve territory; large bores where weight and cost dominate favour a butterfly valve, compared in ball valve vs butterfly valve. Dirty or diverting service suits a plug valve. A check valve has no operator: the flow itself works it.
What every enquiry states
- Size & pressure class
- End connection: flanged, butt-weld, threaded
- Body & trim material
- Service fluid and temperature
- Operator: handwheel, gear, lever, actuated
- Test & certification required
- Class
- What a class marking permits is on the pressure class reference
- Papers
- Test reports and material certificates: name them on the order
- Guide
- Specifying industrial valves, end to end
- Counter
- Phone, email or WhatsApp
How quotation works
Send the valve list as it stands, one line or sixty, by phone, email or WhatsApp to the counter in Subang Jaya. The quotation states what is offered from stock and what is on indent, item by item, with the certificates you asked for named on it. Confirm with a purchase order and collection or delivery is arranged. The full route is on how ordering works; common buyer questions are in the FAQ.
