M SERIES GATE VALVES
The Valveworks USA M series consists of a lineup of gate valves with reliable, proven designs. This series of gate valves offers the user several options depending on the specific application including achieving a positive seal at wellbore/flowline pressures ranging from zero to 5,000 PSI.
M series gate valves are full-bore, through-conduit valves. This allows for downhole tools to be passed through the wellhead and reduces turbulent flow. M series valves are similar to each other in design with only slight variations across the lineup, offering a high percentage of parts interchangeability, giving you an efficiency-driven advantage in the management and maintenance of your gate valve fleet and providing optimal lifecycle management integrity.
Below is an in-depth look at the details of this series of gate valves and explains the features, benefits, characteristics, dimensional & technical data and other valuable information needed to determine which valve suits your specific application.
MODEL MDS – UNIDIRECTIONAL, EXPANDING GATE, CAST BODY
MODEL MSG – BIDIRECTIONAL, SLAB GATE, CAST BODY
MODEL MRC DS – UNIDIRECTIONAL, EXPANDING GATE, FORGED BODY
a) Equipped with a non-sealing seat on the upstream side. See engineering note titled “Model MDS (Model M Directional Seal)” for details.
d) See engineering note titled “Expanding Gate Assembly Operation Explained” for details.
f) Stuffi ng box can be repacked via injectable packing while the valve is in service up to the rated working pressure.
g) Valve bonnet equipped with grease port(s) and fi tting(s) for bearing lubrication.
MODEL MDS – UNIDIRECTIONAL, EXPANDING GATE, CAST BODY
d) See engineering note titled “Expanding Gate Assembly Operation Explained” for details.
f) Stuffing box can be repacked via injectable packing while the valve is in service up to the rated working pressure.
g) Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.
*The actual product may vary slightly from shown schematic due to engineering approved variation
TABLE 1 – PRODUCT FEATURES
MODEL M GATE VALVE VARIATIONS | ||||
---|---|---|---|---|
FEATURES | MDS | MSG | MRC DS | MRC SG |
Flow Direction | Unidirectionala | Bidirectional | Unidirectionala | Bidirectional |
Available Bore Size & Rated Working Pressure (psi)b | 2-1/16" 2K,3K,5K 2-9/16" 2K,3K,5K 3-1/8" 2K,3K,5K 4-1/16" 2K,3K,5K 5-1/8" 2K,3K,5K |
2-1/16" 2K,3K,5K 2-9/16" 2K,3K,5K 3-1/8" 2K,3K,5K 4-1/16" 2K,3K,5K 5-1/8" 2K,3K,5K |
2-1/16" 2K,3K,5K 2-9/16" 2K,3K,5K 3-1/8" 2K,3K,5K 4-1/16" 2K,3K,5K 5-1/8" 2K,3K,5K |
2-1/16" 2K,3K,5K 2-9/16" 2K,3K,5K 3-1/8" 2K,3K,5K 4-1/16" 2K,3K,5K 5-1/8" 2K,3K,5K |
Available PSLc | 1,2 | 1,2 | 1,2,3,3G,4 | 1,2,3,3G,4 |
Material Classes | AA,BB,CC,DD,EE,FF | AA,BB,CC,DD,EE,FF | AA,BB,CC,DD,EE,FF,HH | AA,BB,CC,DD,EE,FF,HH |
Valve Body | Cast | Cast | Forged | Forged |
Gate Type | Expandingd | Slab | Expandingd | Slab |
Sealing Action | Mechanical | Pressure-Energized | Mechanical | Pressure-Energized |
Operation Type | Manuale | Manuale | Manuale | Manuale |
Bore Type | Full-Boref | Full-Boref | Full-Boref | Full-Boref |
Gate/Seat Seal | Metal to Metal | Metal to Metal | Metal to Metal | Metal to Metal |
Stem Type | Non-rising | Non-rising | Non-rising | Non-rising |
Stem Packing Type | Chevron-V | Chevron-V | Chevron-V | Chevron-V |
Repacking | Yesg | Yesg | Yesg | Yesg |
Thrust Bearings | 2 | 2 | 2 | 2 |
Body Lubrication Fittings | 2h | 2h | 2h | 2h |
Body/Bonnet Connection | Bolted | Bolted | Bolted | Bolted |
End Connections | Flanged (RTJ) or Threaded | Flanged (RTJ) or Threaded | Flanged (RTJ) or Threaded | Flanged (RTJ) or Threaded |
Temperature Range | -75°F (-60°C) Thru 250°F (121°C) | -75°F (-60°C) Thru 250°F (121°C) | -75°F (-60°C) Thru 250°F (121°C) | -75°F (-60°C) Thru 250°F (121°C) |
a. Equipped with a non-sealing seat on the upstream side. See engineering note titled “Model MDS & Model MRC DS” for details.
b. 2 1/16″ x 1 13/16″, 3 1/8″ x 3 3/16″, 4 1/16″ x 4 1/8″, and 4 1/16″ x 4 1/4″ available upon request.
c. Product Specification Level
d. See engineering note titled “Expanding Gate Assembly Operation Explained” for details.
e. Also referred to as “HANDWHEEL OPERATED”
f. Also referred to as “FULL OPENING”.
g. Stuffing box can be repacked via injection packing
h. Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.
ENGINEERING NOTES
Expanding Gate Assembly Operation Explained – The expanding gate assembly consists of two main components: the gate (major) and the segment (minor). These components are assembled together using precision machined pins and high-quality precision formed and treated Nickel-Chromium alloy springs. When the valve is manually operated, the gate and segment act one against the other by means of a dual expanding wedge when the valve is either fully-opened or fully-closed. This expansion effect of the gate assembly against the valve seats through parallel faces of the gate assembly provides a strong and positive seal against pulsations and vibrations created by flow conditions.
Model MDS & Model MRC DS – These models are unidirectional gate valves equipped with an expanding gate assembly and a sealing seat in the downstream seat pocket. The upstream seat pocket is equipped with a non-sealing seat assembly. This allows pressure to bypass the upstream seat, equalize throughout the valve body, and only seal against the downstream seat assembly as the original Model M was intended. All model MDS valves are marked with a flow direction arrow for accurate installation.
NOTE: When bidirectional operation is required, a slab gate valve is necessary. M Series expanding gate valves (Model MDS and Model MRC DS) are not designed for bidirectional operation.
Pressure Testing – M series gate valves are not intended to be tested through the body lubrication fittings. These fittings are designed for lubrication purposes only. Shell tests and gate/seat tests shall be conducted from the end/outlet connection by qualified personnel.
TABLE 2 – TEMPERATURE RATING
TEMPERATURE CLASSIFICATION | OPERATING RANGE |
---|---|
K | -75°F (-60°C) TO 180°F (82°C) |
L | -50°F (-46°C) TO 180°F (82°C) |
N | -50°F (-46°C) TO 140°F (60°C) |
P | -20°F (-29°C) TO 180°F (82°C) |
S | 0°F (-18°C) TO 140°F (60°C) |
T | 0°F (-18°C) TO 180°F (82°C) |
U | 0°F (-18°C) TO 250°F (121°C) |
V | 35°F (2°C) TO 250°F (121°C) |
TABLE 3 – MATERIAL REQUIREMENTS
MINIMUM MATERIAL REQUIREMENTS | |||
---|---|---|---|
MATERIAL CLASS | BODY, BONNET END & OUTLET CONNECTIONS | PRESSURE-CONTROLLING PARTS & STEMS | |
AA | General Service | Carbon or Low-Alloy Steel | Carbon or Low-Alloy Steel |
BB | General Service | Carbon or Low-Alloy Steel | Stainless Steel |
CC | General Service | Stainless Steel | Stainless Steel |
DD | Sour Servicea | Carbon or Low-Alloy Steelb | Carbon or Low-Alloy Steelb |
EE | Sour Servicea | Carbon or Low-Alloy Steelb | Stainless Steelb |
FF | Sour Servicea | Stainless Steelb | Stainless Steelb |
HH | Sour Servicea | CRAacd | CRAacd |
VALVEWORKS USA DESCRIPTION KEY
GV, | 6A, | MOD MDS, | EXP GATE, | 2 1/16" | 5M | FE | DD-NL- | KU- | 1- | 2, | HWO | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
GATE VALVE | ||||||||||||
SPECIFICATION | ||||||||||||
VALVEWORKS USA MODEL | ||||||||||||
GATE TYPE | ||||||||||||
BORE SIZE (NOMINAL) | ||||||||||||
RATED WORKING PRESSURE | ||||||||||||
END CONNECTION | ||||||||||||
MATERIAL CLASS | ||||||||||||
TEMPERATURE RATING/CLASSIFICATION | ||||||||||||
PSL | ||||||||||||
PR | ||||||||||||
OPERATION TYPE |
ABBREVIATION KEY
- MSG = Model M Slab Gate
- MDS = Model M Unidirectional
- MRC SG = Model M Round Cavity Slab Gate
- MRC DS = Model M Round Cavity Unidirectional
- HWO = Handwheel Operated (manual)
- EXP = Expanding
- SG = Slab Gate
- FE = Flanged End
- RTJ = Ring Type Joint
- PSL = Product Specification Level
- PR = Performance Requirement
- LP = Line Pipe
- STC = Casing Short Thead
- LC = Casing Long Thead
- EU = Tubing, Ecternal Upset
- CRA = Corrosion-resistant Alloy
- XYL = Xylan®
- HF = Hardfaced
DIMENSION TABLE KEY
Key | Description |
---|---|
A | Face to Face |
B | Valve Bore Size (Nominal) |
C | Bore Centerline to Bottom |
D | Bore Centerline to Top |
E | Handwheel Diameter |
NT | Number of Turns |
RJ | Ring Joint |
TS | Thread Size |
BBS | Bonnet Stud Size |
N | Number of Studs |
WT | Approximate Weight |
HT | Handwheel Operating Torque |
FLANGED GATE VALVES
SIZE | WP (PSI) | A | B | C | D | E | NT | RJ | BSS | N | WT(LBS) | HT(FT-LBS) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
21/16 | 2K | 11 5/8 | 2 1/16 | 5 1/4 | 19 1/2 | 10 | 14 | R-23 | 5/8 | 8 | 120 | 32 |
3K | 14 5/8 | 2 1/16 | 5 1/2 | 19 5/8 | 13 | 14 | R-24 | 7/8 | 8 | 180 | 40 | |
5K | 14 5/8 | 2 1/16 | 5 1/2 | 19 5/8 | 13 | 14 | R-24 | 7/8 | 8 | 180 | 57 | |
29/16 | 2K | 13 1/8 | 2 9/16 | 6 3/8 | 20 1/2 | 13 | 16 1/2 | R-26 | 5/8 | 8 | 180 | 37 |
3K | 16 5/8 | 2 9/16 | 6 5/8 | 20 7/8 | 16 | 16 1/2 | R-27 | 7/8 | 8 | 220 | 49 | |
5K | 16 5/8 | 2 9/16 | 6 5/8 | 20 7/8 | 16 | 16 1/2 | R-27 | 7/8 | 8 | 220 | 66 | |
31/8 | 2K | 14 1/8 | 3 1/8 | 7 5/8 | 22 7/8 | 13 | 20 3/4 | R-31 | 7/8 | 8 | 220 | 48 |
3K | 17 1/8 | 3 1/8 | 7 5/8 | 23 | 16 | 20 3/4 | R-31 | 1 | 8 | 300 | 65 | |
5K | 18 5/8 | 3 1/8 | 7 5/8 | 23 | 16 | 20 3/4 | R-35 | 1 | 8 | 340 | 90 | |
41/16 | 2K | 17 1/8 | 4 1/16 | 9 5/8 | 26 1/2 | 16 | 24 3/4 | R-37 | 1 | 8 | 360 | 81 |
3K | 20 1/8 | 4 1/16 | 9 5/8 | 26 5/8 | 20 | 24 3/4 | R-37 | 1 3/8 | 8 | 520 | 67 | |
5K | 21 5/8 | 4 1/16 | 9 5/8 | 26 5/8 | 20 | 24 3/4 | R-39 | 1 3/8 | 8 | 560 | 130 | |
51/8 | 2K | 22 1/2 | 5 1/8 | 11 3/4 | 30 | 24 | 30 1/4 | R-41 | 1 3/8 | 8 | 770 | 150 |
3K | 24 1/8 | 5 1/8 | 11 3/4 | 30 | 24 | 30 1/4 | R-41 | 1 3/8 | 8 | 810 | 210 | |
5K | 28 5/8 | 5 1/8 | 11 3/4 | 30 | 24 | 30 1/4 | R-41 | 1 3/8 | 8 | 940 | 366 |
All dimensions are in inches.
THREADED GATE VALVES
SIZE | WP (PSI) | A | B | C | D | E | NT | TS | BSS | N | WT (LBS) | HT (FT-LBS) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2 1/16 | 5K | 9 5/8 | 2 1/16 | 5 1/2 | 19 5/8 | 13 | 14 | 2 LP 2 3/8 EU |
7/8 | 8 | 125 | 57 |
2 9/16 | 3K | 10 1/4 | 2 9/16 | 6 5/8 | 20 7/8 | 16 | 16 1/2 | 2 1/2 LP | 7/8 | 8 | 160 | 49 |
5K | 10 1/4 | 2 9/16 | 6 5/8 | 20 7/8 | 16 | 16 1/2 | 2 7/8 EU | 7/8 | 8 | 160 | 66 | |
3 1/8 | 3K | 11 3/8 | 3 1/8 | 7 5/8 | 23 | 16 | 20 3/4 | 3 LP | 1 | 8 | 230 | 65 |
5K | 11 3/8 | 3 1/8 | 7 5/8 | 23 | 16 | 20 3/4 | 3 1/2 EU | 1 | 8 | 230 | 90 | |
4 1/16 | 3K | 13 | 4 1/16 | 9 5/8 | 26 5/8 | 20 | 24 3/4 | 4 LP | 1 3/8 | 8 | 420 | 67 |
5K | 13 | 4 1/16 | 9 5/8 | 26 5/8 | 20 | 24 3/4 | 4 1/2 EU 4 1/2 LC |
1 3/8 | 8 | 420 | 130 |
All dimensions are in inches.