Highlight: Globe valve
Product introduction:Globe valve
Globe valve is a kind of cut-off valve, its sealing is by applying torque to the valve stem,
the stem in the axial direction to apply pressure to the valve
disc, so that the disc sealing face and seat sealing face tightly
fit, prevent media leakage along the gap between the sealing face.The sealing pair of globe valve consists of the disc sealing face
and the seat sealing face. The stem drives the disc to move
vertically along the center line of the seat.The opening height of
the globe valve is small in the opening and closing process, which
is easy to adjust the flow rate, convenient for manufacturing and
maintenance, and wide applicable range of pressure.
Product technical parameters:
Nominal Diameter DN (mm) | 15~300 |
Nominal Pressure PN (MPa) | 1.6 |
Test Pressure (MPa) | Strength (water) | 2.4 |
Enclose (Water) | 1.76 |
Main Components | Body | Stainless steel |
Bonnet | Stainless steel |
Dsic | Stainless steel |
Stem | Stainless steel |
Yoke nut | Brass |
Working temperature | ≤200℃ |
Medium suitable | Water, steam, oil and weak corrosive mediums |
Connection | Flange connection |
Product features:
1. In terms of structure, globe valve is simpler than gate valve.
There is only one sealing surface on the valve body and valve disc,
which has good manufacturing technology and is easy to manufacture
and maintain.Globe valve in the full closing process of the disc
travel is small, its height is relatively small gate valve.
2. The opening height of the globe valve is small in the opening
and closing process. The opening height is generally only 1/4 of
the diameter of the valve seat channel and has very reliable
cutting action, which is easy to adjust the flow.
3. From the service life, once in the open state, there is no
contact between the seat and the sealing surface of the disc, the
sealing surface is not easy to wear and scratch, so it improves the
service life of the seal.
4. The globe valve only allows one-way flow of media, directional
installation, the length of the globe valve structure is greater
than the gate valve.
5. The opening and closing torque of globe valve is large and it is
difficult to realize fast opening and closing. Moreover, the flow
passage in the valve is tortuous and the fluid flow resistance is
large, resulting in a large loss of fluid power in the pipeline
6. When the medium from below the valve disc into the valve, the
operation force needs to overcome the resistance, is the friction
of the stem and packing and the thrust produced by the pressure of
the medium,
7. Globe valve closing valve force is larger than opening valve force,
so the stem diameter should be large, otherwise stem top bending
failure will occur.
