XT SERIES GATE VALVES
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Fields containing oil with high viscosity (also referred to as heavy oil) require Enhanced Oil Recovery (EOR) methods such as Steam Assisted Gravity Drainage (SAGD). The injection of steam into the reservoir requires reliable equipment suitable for elevated temperatures. The Valveworks USA Extreme Temperature (XT) series consists of a lineup of gate valves with industry-leading sealing technology, reliable and proven designs that are engineered and manufactured to meet the requirements of API 6A while providing optimal performance in elevated temperature environments up to 650°F (345°C).

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 15,000 PSI. XT series gate valves are full-bore valves. This allows for downhole tools to be passed through the wellhead and reduces turbulent flow. XT 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.

This document provides 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 provides an optimal solution for your specific application.

Table 1 - Product Features

XT Series Gate Valves Product Features
  1. Equipped with a non-sealing seat on the upstream side. See engineering note titled "Model XT1DS & Model XT1RC DS" for details.
  2. 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.
  3. Product Specification Level
  4. See engineering note titled "Expanding Gate Assembly Operation Explained" for details.
  5. Also referred to as "HANDWHEEL OPERATED"
  6. Stuffing box can be repacked via injectable packing while the valve is in service up to the rated working pressure.
  7. Stuffing box can be repacked via back seat while the valve is in service up to the rated working pressure.
  8. Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.

TABLE 1 - PRODUCT FEATURES

MODEL XTM GATE VALVE VARIATIONS
FEATURES XT1DS XT1SG XT1RC DS XT1RC SG XT2
Flow Direction Unidirectionala Bidirectional Unidirectionala Bidirectional Bidirectional
Available
Bore Sizeb
& Rated Working Pressure (psi)
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
1-13/16" 10K,15K
2-1/16" 5K,10K,15K
2-9/16" 5K,10K,15K
3-1/8" 3K,5K
3-1/16" 10K,15K
4-1/16" 3K,5K,10K
Available PSLc 1,2 1,2 1,2,3,3G 1,2,3,3G 1,2,3,3G
Available PRc 1,2,2F 1,2,2F 1,2,2F 1,2,2F 1,2,2F
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 AA,BB,CC,DD,EE,FF,HH
Valve Body Cast Cast Forged Forged Forged
Gate Type Expandingd Slab Expandingd Slab Slab
Sealing Action Mechanical Pressure-Energized Mechanical Pressure-Energized Pressure-Energized
Operation Type Manuale Manuale Manuale Manuale Manuale
Bore Type Full-Bore Full-Bore Full-Bore Full-Bore Full-Bore
Gate/Seat Seal Metal to Metal Metal to Metal Metal to Metal Metal to Metal Metal to Metal
Stem Type Non-rising Non-rising Non-rising Non-rising Non-rising
Stem Packing Type Grafoil®-V Grafoil®-V Grafoil®-V Grafoil®-V Spring-Energized
Repacking Yesf Yesf Yesf Yesf Yesg
Thrust Bearings 2h 2h 2h 2h 2h
Body Lubrication Fittings 2 2 2 2 1
Body/Bonnet Connection Bolted Bolted Bolted Bolted Bolted
End Connections Flanged (RTJ) Flanged (RTJ) Flanged (RTJ) Flanged (RTJ) Flanged (RTJ)
Temperature Range -50°F (-46°C) Thru 650°F (345°C) -50°F (-46°C) Thru 650°F (345°C) -50°F (-46°C) Thru 650°F (345°C) -50°F (-46°C) Thru 650°F (345°C) -2°0F (-29°C) Thru 350°F (180°C)
  1. Equipped with a non-sealing seat on the upstream side. See engineering note titled "Model XT1DS & Model XT1RC DS" for details.
  2. 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.
  3. Product Specification Level
  4. See engineering note titled "Expanding Gate Assembly Operation Explained" for details.
  5. Also referred to as "HANDWHEEL OPERATED"
  6. Stuffing box can be repacked via injectable packing while the valve is in service up to the rated working pressure.
  7. Stuffing box can be repacked via back seat while the valve is in service up to the rated working pressure.
  8. 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. This is advantageous when attempting to accomplish a positive seal in both high and low pressure conditions.

Model XT1DS & Model XT1RC 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 XT1DS valves are marked with a flow direction arrow for accurate installation.

NOTE: When bidirectional operation is required, a slab gate valve is necessary. XT1 Series expanding gate valves (Model XT1DS and Model XT1RC DS) are not designed for bidirectional operation.

Pressure Testing - XT1 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 only.

Table 2 - Temperature Rating

CLASSIFICATION OPERATING TEMP. RANGE
L -50°F (-46°C) TO 180°F (82°C)
P -20°F (-29°C) TO 180°F (82°C)
X 0°F (-18°C) TO 350°F (180°C)
Y 0°F (-18°C) TO 650°F (345°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
  1. As defined by ISO 15156 (all parts) (NACE MR0175; See Clause 2).
  2. In accordance with ISO 15156 (NACE MR0175; See Clause 2).
  3. CRA required on retained-fluid wetted surfaces only.
  4. CRA as defined in Clause 3; ISO 15156 (all parts) (NACE MR0175; See Clause 2) definition of CRA does not apply.

Valveworks USA Description Key

GV, 6A, MOD XT1DS, EXP GATE, 2 1/16" 5M FE DD-NL- X- 1- 2, HWO
GATE VALVE
API 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

  • XT1SG = Model XT1 Slab Gate
  • XT1DS = Model XT1 Directional Seal
  • XT1RC SG = Model XT1 Round Cavity Slab Gate
  • XT1RC DS = Model XT1 Round Cavity Directional Seal
  • XT2 = Model XT2 Slab Gate
  • 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
BSS Bonnet Stud Size
N Number of Studs
WT Approximate Weight
HT Handwheel Operating Torque
XT Series Gate Valve Dimensions

XT1 Flanged Gate Valves

SIZE WP (PSI) A B C D E NT RJ BSS N WT
(LBS)
HT
(FT-LBS)
2 1/16 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
2 9/16 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
3 1/8 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
4 1/16 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
5 1/8 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.

XT2 Flanged Gate Valves

SIZE WP (PSI) A B C D E NT RJ BSS N WT
(LBS)
HT
(FT-LBS)
1 13/16 10K 18 1/4 1 13/16 5 13/16 18 13/16 16 11 3/4 BX-151 1 1/8 8 270 59
15K 18 1 13/16 6 13/16 18 13/16 16 11 3/4 BX-151 1 1/4 8 275 89
2 1/16 5K 14 5/8 2 1/16 5 7/8 18 7/8 14 12 R-24 7/8 8 189 32
10K 20 1/2 2 1/16 5 13/16 18 13/16 16 12 1/2 BX-152 1 1/8 8 275 66
15K 19 2 1/16 6 1/8 18 13/16 16 12 1/2 BX-152 1 1/4 8 350 103
2 9/16 5K 16 5/8 2 9/16 6 5/16 19 1/2 16 16 1/4 R-27 1 8 275 49
10K 22 1/4 2 9/16 6 7/8 19 5/8 20 16 BX-153 1 1/4 8 485 111
15K 21 2 9/16 7 13/16 22 7/8 20 15 1/2 BX-153 1 1/8 12 520 221
3 1/8 3K 17 1/8 3 1/8 7 13/16 20 1/2 16 17 1/2 R-31 1 1/8 8 337 40
5K 18 5/8 3 1/8 7 9/16 20 1/2 16 17 1/2 R-35 1 1/8 8 355 67
3 1/16 10K 24 3/8 3 1/16 8 1/8 22 23 17 1/2 BX-154 1 3/8 8 550 140
15K 23 9/16 3 1/16 9 1/8 25 5/8 23 15 1/2 BX-154 1 3/8 12 914 308
4 1/16 3K 20 1/8 4 1/16 9 5/16 22 20 24 1/4 R-37 1 1/4 8 498 70
5K 21 5/8 4 1/16 9 13/16 22 20 23 1/4 R-39 1 1/4 8 550 113
10K 26 3/8 4 1/16 10 1/8 28 3/4 24 23 1/4 BX-155 1 5/8 8 950 258
  All dimensions are in inches.

Model XT1DS - Unidirectional, Expanding Gate, Cast Body

Model XT1DS - Unidirectional, Expanding Gate, Cast Body
a) Equipped with a non-sealing seat on the upstream side. See engineering note titled "Model XT1DS & Model XT1RC DS*" for details.
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 rates working pressure.
h) Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.

Model XT1SG - Bidirectional, Slab Gate, Cast Body

Model XT1SG - Bidirectional, Slab Gate, Cast Body
f) Stuffing box can be repacked via injectable packing while the valve is in service up to the rates working pressure.
h) Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.

Model XT1RC DS - Unidirectional, Expanding Gate, Forged Body

Model XT1RC DS - Unidirectional, Expanding Gate, Forged Body
a) Equipped with a non-sealing seat on the upstream side. See engineering note titled "Model XT1DS & Model XT1RC DS*" for details.
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 rates working pressure.
h) Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.

Model XT1RC SG - Bidirectional, Slab Gate, Forged Body

Model XT1RC SG - Bidirectional, Slab Gate, Forged Body
f) Stuffing box can be repacked via injectable packing while the valve is in service up to the rates working pressure.
h) Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.

Model XT2 - Bidirectional, Slab Gate, Forged Body

Model XT2 - Bidirectional, Slab Gate, Forged Body
g) Valve bonnet equipped with grease port(s) and fitting(s) for bearing lubrication.
h) Valve bonnet equipped with grease port and fitting for bearing lubrication.

*The actual product may vary slightly from shown schematic due to engineering approved variation


Last Updated: 10/26/2018

DISCLAIMER: THE ACTUAL PRODUCT MAY VARY SLIGHTLY FROM SHOWN SCHEMATIC DUE TO ENGINEERING APPROVED VARIATION.

WARNING: L7M / B7M STUDS CANNOT BE SUBSTITUED FOR L7 / B7 STUDS.