Is ZG 1/2\" the same as G1/2\"?
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Is ZG 1/2\" the same as G1/2\"?
It’s different! The former is a half-inch tapered pipe thread, while the latter is a half-inch pipe thread
Reply to 2# lmsa613: Yes, the pressure gauge port available on the device is of ZG1/2\" type. Should we simply install a ball valve of M20*1.5/ZG 1/2\" type, and then connect it to the pressure gauge with an M20*1.5 connection?
ZG is a tapered pipe thread; G* thread is not the same thing.
Reply to 4# Honest Technology: What’s the difference? What are the differences in terms of application?
Reply to 5# rujimmy: Tapered pipe threads are generally used in applications where high sealing or fixing performance is required. For the installation of pressure gauges, a valve needs to be installed at the bottom of the gauge; usually a needle valve is used for this purpose, while ball valves can be employed only in situations where the pressure is low and strict requirements do not apply.
ZG is commonly known as pipe thread, meaning that the thread is formed by a conical surface; most ordinary pipe fittings use this type of thread. According to national standards, Rc G refers to a non-threaded sealing pipe thread with a 55-degree angle, and it belongs to the Whitworth thread family. The designation G denotes a cylindrical thread. **For standards, refer to GB/T7307-2001. Pipe threads are primarily used for connecting pipes, with tight fit between their internal and external threads; there are both straight-thread and tapered-thread types. The nominal diameter refers to the diameter of the pipe being connected; obviously, the thread diameter is larger than the nominal diameter.
The marking for tapered pipe threads as specified in GB3706 should be R, while the marking for circular pipe threads as specified in GB3707 is G
Reply to 7# Honest Technology: Do you have ball valves of type M20*1.5-ZG 1/2"?
The ball valve should have ZG 1/2\" connections at both ends; an adapter fitting with a single end, M20*1.5/ZG 1/2\", is required, which is then connected to the pressure gauge with a M20*1.5 connection. .
The ball valve should have ZG 1/2\" connections at both ends; an adapter fitting with a single end, M20*1.5/ZG 1/2\", is required, which is then connected to the pressure gauge with a M20*1.5 connection. .