Structure Types of Globe Valves
Release date:
2019-02-19
Author:
Source:
Abstract
|
Name |
Structural form |
Applicable Design Standards |
|
Typical Forged Steel Globe Valve |
1. Flow passages: JB/T 7746-1995 – Shrinkage Holes; BS5352-1999 – Through-holes or Shrinkage Holes (CL150–800); Through-holes (CL1500). JPI-7S-36-1999 – Through-holes. 2. Valve body and bonnet connections: Flanged, threaded, or welded. 3. Connection ends: JB/T 7746-1995 – Internal threads, socket welding, or flanges. BS5362-1999 – Internal threads, socket connection, flanges, and butt welding. JPI-7S-36-1999 – Internal threads, socket connection. |
JB/T 7746-1995, BS 5352-1999, JPI-7S-36-1999 |
|
Self-sealing Forged Steel Globe Valve with Internal Pressure |
1. Flow passage: Shrinkage cavity 2. Valve body and bonnet connection: Self-sealing under internal pressure 3. Connection ends: Butt weld, flange, or socket |
ASME B16.34-1996 |
|
Cast Steel Globe Valve |
1. Flow paths: available in three types—angle, straight-through, and Y-type (DC). 2. Valve body-to-valve cover connection: flanged. 3. Connection ends: flanged or butt-welded. 4. A variety of valve disc designs can be used; typically, these are rising stem, though a small number of valves with smaller diameters feature non-rising stem designs. |
JPI-7S-46-1999, JIS B2071-1999, JIS B2072-1999, JIS B2081-1999, JIS B2082-1999, BS 1873-1999, MSS-SP-42-1999, GB/T 12235-1989, BS 5160-1989 |
|
Bellows-Sealed Shut-off Valve |
1. Flow paths: Available in three types—angle, straight-through, and Y-type direct flow. 2. Valve body-to-valve bonnet connection: Flanged. 3. Connection ends: Flanged or butt-welded. 4. A variety of valve disc designs can be used; typically, these are exposed stem designs, though a small number of valves with smaller diameters feature hidden stem designs. 5. Dual stem sealing system using both a bellows and packing. |
ASME B16.34-1996 |
|
Angle-type High-Pressure Shut-off Valve |
1. Flow passage: Angle type 2. Valve body-to-valve cover connection: Threaded, clamp, or welded 3. Various types of disc designs can be used; for ultra-high-pressure valves, internally pressurized self-balancing discs are typically employed 4. The valve body can be either monolithic or two-piece 5. Connection ends: Flanged or butt-welded |
ASME B16.34-1996 GB/T 12235-1989 |
|
Lined Shut-off Valve |
1. Flow paths: available in three types—angle, straight-through, and direct-flow (Y-type) 2. Valve body-to-valve bonnet connection: flanged 3. Connection ends: flanged or butt-welded 4. Lining materials include rubber, plastic, and others |
ASME B16.34-1996 |
|
Two-way Three-Way Shut-off Valve |
1. Flow Path: Bidirectional Three-Way Flow Path 2. Valve Body to Valve Cover Connection: Flange 3. Connection End: Flange or Butt Weld |
ASME B16.34-1996 |
|
Cast Steel Discharge Valve |
1. Flow path: Straight-through type 2. Connection end: Flange 3. Disc: Top-swinging or bottom-swinging design 4. Valve body-to-valve cover connection: Flange |
ASME B16.34-1996 |
|
Three-way Shut-off Valve |
1. Flow passage: Three-way fitting 2. Connection end: Flange 3. Valve disc: Flat sealing |
ASME B16.34-1996 |
|
Pressure Gauge Shut-off Valve |
1. Flow paths: straight, right-angle, and three-way 2. Valve body-to-valve cover connection: either integral forging or threaded 3. Connection ends: external threads or clamp fittings 4. Valve disc: available in both tapered and flat designs |
ASME B16.34-1996 |
|
Water-sealed shut-off valve |
1. Flow path: Direct current 2. Connection ends: Socket-welded, butt-welded 3. Valve body and bonnet: Both forged, made of either chromium-nickel steel or carbon steel 4. Disc: Conical-seal design (DN10–25 mm), flat-seal design (DN32–200 mm) |
E101-1999 GB/T 12235-1999 ASME B16.34-1996 |
|
Slurry Valve |
1. Flow path: Direct current 2. Connection end: Flange 3. Valve body structure: Consists of left and right valve bodies with a valve seat sandwiched in between; the left and right valve bodies are connected by bolts. 4. Valve body to bracket connection: Bolted assembly. 5. Bonnet: For CL150, it’s a single-piece forged design; for CL300 and CL400, it’s a split-type bonnet connected via support posts. 6. Disc: Features either a conical sealing surface transitioning to a flat seal, or a throttling-type sealing surface with hard alloy overlay welding. |
GB/T 12235-1989 ASME B16.34-1996 |
|
Angle-type Throttle Valve |
1. Flow passage: Right-angle 2. Connection end: Flange 3. Valve body and bonnet: Forged throttling design, with a sleeve featuring drilled holes; the piston moves up and down inside the sleeve to regulate flow. 4. Valve body and bonnet are connected by "bolted joints." |
API 6A-2002 |
|
Titanium Butt-Welding Valve |
1. Flow path: Straight-through 2. Valve body, bonnet, stuffing box, disc, and stem are made of titanium. 3. Valve body and bonnet connection: Bolted joint 4. Disc features a flat-face sealing design |
GB/T 12235-1989 |
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