FM4 SERIES GATE VALVES
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The Valveworks USA FM4 Series consists of a lineup of gate valves with reliable, proven designs that are engineered and manufactured to meet the requirements of API 6A, and where a 7 1/16" bore is required. This series of gate valves offer the user several options depending on the specific application. Whether you need to achieve a seal at little to zero pressure, or at 5,000 PSI, there is a valve for your specific application in the FM4 Series.

FM4 Series gate valves are full bore, through conduit valves. This allows for downhole tools to be passed through the wellhead and / or Christmas tree and reduces turbulent flow. FM4 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 life cycle management integrity.

This page 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

FM4 Series Gate Valves Product Features
  1. Equipped with a non-sealing seat on the upstream side. See engineering note titled "Model FM4 & Model FM4 RC" for details.
  2. 7-1/16" X 5-1/8", 7-1/16" X 6", 7-1/16" X 6-1/8", 7-1/16" X 6-3/8", 7-1/16" X 6-5/8", and 7-1/16" x 7-1/8" 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. Ball Screw Operated (BSOP) - Manual gate valve with torque / turn reduction (TTR) operator (15-1/2 turns, full open / closed). See engineering note titled "Torque / Turn Reduction (TTR)" for details.
  7. Also referred to as "FULL OPENING".
  8. Injectable packing can be energized into the valve bonnet stuffing box under pressure.
  9. Repacking is achieved via stem backseat method.
  10. Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication

TABLE 1 - PRODUCT FEATURES

FM4 GATE VALVE VARIATIONS
FEATURES FM4 FM4 SG FM4 RC FM4 RC SG FM4 BSOPf FM4 RC BSOPf
Flow Direction Bidirectionala Bidirectional Unidirectionala Bidirectional Bidirectional Unidirectional
Available
Bore Sizesb
& Rated Working
Pressure (PSI)
7 1/16"
2K,3K,5K
7 1/16"
2K,3K,5K
7 1/16"
2K,3K,5K
7 1/16"
2K,3K,5K
7 1/16"
3K,5K
7 1/16"
3K,5K
Available PSLc 1,2 1,2 1,2,3,3G 1,2,3,3G 1,2 1,2,3,3G
Material Classes AA,BB,CC,DD,EE,FF AA,BB,CC,DD,EE,FF AA,BB,CC,DD,EE,FF AA,BB,CC,DD,EE,FF AA,BB,CC,DD,EE,FF AA,BB,CC,DD,EE,FF
Valve Body Cast Cast Forged Forged Cast Forged
Gate Type Expandingd Slab Expandingd Slab Slab Slab
Sealing Action Mechanical Pressure-Energized Mechanical Pressure-Energized Pressure-Energized Pressure-Energized
Operation Manuale Manuale Manuale Manuale Manualf Manualf
Bore Type Thru-Conduitg Thru-Conduitg Thru-Conduitg Thru-Conduitg Thru-Conduitg Thru-Conduitg
Gate/Seat Seal Metal to Metal 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 Rising Rising
Stem Packing Type Opti-Seal Opti-Seal Opti-Seal Opti-Seal Opti-Seal Opti-Seal
Repacking Yesh Yesh Yesh Yesh Yesi Yesi
Bearing 2j 2j 2j 2j 3j 3j
Body Lubrication Fittings 2 2 2 2 2 2
Body/Bonnet Connection Bolted Bolted Bolted Bolted Bolted Bolted
Balance Stem No No No No Yes Yes
End Connections Flanged (RTJ) Flanged (RTJ) Flanged (RTJ) Flanged (RTJ) Flanged (RTJ) Flanged (RTJ)
Temperature Range -75F (-60C) Thru 250F (121C) -75F (-60C) Thru 250F (121C) -75F (-60C) Thru 250F (121C) -75F (-60C) Thru 250F (121C) -75F (-60C) Thru 250F (121C) -75F (-60C) Thru 250F (121C)
  1. Equipped with a non-sealing seat on the upstream side. See engineering note titled "Model FM4 & Model FM4 RC" for details.
  2. 7-1/16" X 5-1/8", 7-1/16" X 6", 7-1/16" X 6-1/8", 7-1/16" X 6-3/8", 7-1/16" X 6-5/8", and 7-1/16" x 7-1/8" 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. Ball Screw Operated (BSOP) - Manual gate valve with torque / turn reduction (TTR) operator (15-1/2 turns, full open / closed). See engineering note titled "Torque / Turn Reduction (TTR)" for details.
  7. Also referred to as "FULL OPENING".
  8. Injectable packing can be energized into the valve bonnet stuffing box under pressure.
  9. Repacking is achieved via stem backseat method.
  10. Valve bonnet / ball screw housing (where applicable) 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.

Pressure-loading Explained - Pressure-loading is an event that occurs in a valve equipped with an expanding gate when the segment (minor) has a differential pressure and frictional drag from the valve body. This differential pressure across the gate assembly and seat sealing surfaces can make the valve inoperable and result in severe damage if valve operation is attempted during this event. Due to the advancements in sealing surface manufacturing processes, gate valves equipped with an expanding gate have exhibited the tendency to pressure-load. This tendency increases with an increase in bore size and pressure.

Model FM4 and Model FM4 RC - All FM4 Series valves equipped with expanding gates are unidirectional gate valves. 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, all unidirectional valves in the FM4 Series are marked with a flow direction arrow for accurate installation.

NOTE: When bidirectional operation is required, a slab gate valve is mandatory. FM4 expanding gate valves (Model FM4 and Model FM4 RC) are not designed for bidirectional operation.

Pressure Testing - FM4 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.

Torque / Turn Reduction (TTR) - FM4 Series gate valves are offered with an optional ball screw operator, which reduces the number of handwheel turns by approximately 60%, and greatly reduces the operating torque when opening and/or closing the valve. The number of turns required for a regular handwheel operated valve is between 39-1/4 to 39-1/2 from full open to full closed. The ball screw operated (BSOP) version of the same valve requires only 15-1/2 turns. This can be beneficial when time is of the essence.

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
  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-FM4, EXP GATE, 7 1/16& 5M FE DD-NL- KU- 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

  • FM4 = Model FM4
  • FM4 SG = Model FM4 Slab Gate
  • FM4 RC = Model M Round Cavity
  • FM4 RC SG = Model M Round Cavity Slab Gate
  • FM4 BSOP = Model FM4 Ball Screw Operated
  • FM4 RC BSOP= Model FM4 Round Cavity Ball Screw Operated
  • HWO = Handwheel Operated (manual)
  • BSOP = Ball Screw Operated
  • EXP = Expanding
  • SG = Slab Gate
  • FE = Flanged End
  • RTJ = Ring Type Joint
  • PSL = Product Specification Level
  • PR = Performance Requirement
  • CRA = Corrosion-resistant Alloy
  • XYL = Xylan®
  • HF = Hardfaced

Dimension Table Key

Key Description
A Flange to Flange
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
BBS Bonnet Stud Size
WT Approximate Weight
FM4 Series Gate Valve Dimensions

Flanged Gate Valves

SIZE WP (PSI) A B C D E NT RJ BSS WT (LBS)
7 1/16 2K 25 1/8 7 1/16 16 5/8 33 1/2 24 39 1/4 R-45 1 1/4 1047
7 1/16 3K 28 1/8 7 1/16 16 5/8 33 1/2 24 39 1/4 R-45 1 1/4 1550
7 1/16 5K 32 7 1/16 16 5/8 33 1/2 30 39 1/4 R-46 1 1/4 1650
  All dimensions are in inches.

BSOP Flanged Gate Valves

SIZE WP (PSI) A B C D E NT RJ BSS WT (LBS)
7 1/16 3K 28 1/8 7 1/16 30 1/8 56 28 15 1/2 R-45 1 1/4 1915
7 1/16 5K 32 7 1/16 30 1/8 56 28 15 1/2 R-46 1 1/4 2015
  All dimensions are in inches.

Model FM4 - Unidirectional, Expanding Gate, Cast Body

 Unidirectional, Expanding Gate, Cast Body
d) See engineering note titled "Expanding Gate Assembly Operation Explained" for details.
h) Injectable packing can be energized into the valve bonnet stuffing box under pressure.
j) Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication.

Model FM4 SG - Bidirectional, Slab Gate, Cast Body

Model FM4 SG - Bidirectional, Slab Gate, Cast Body
h) Injectable packing can be energized into the valve bonnet stuffing box under pressure.
j) Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication.

Model FM4 RC - Unidirectional, Expanding Gate, Forged Body

Model FM4 RC - Unidirectional, Expanding Gate, Forged Body
d) See engineering note titled "Expanding Gate Assembly Operation Explained" for details.
h) Injectable packing can be energized into the valve bonnet stuffing box under pressure.
j) Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication.

Model FM4 RC SG - Bidirectional, Slab Gate, Forged Body

Model FM4 RC SG - Bidirectional, Slab Gate, Forged Body
h) Injectable packing can be energized into the valve bonnet stuffing box under pressure.
j) Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication.

Model FM4 BSOP - Bidirectional, Slab Gate, Cast Body

Model FM4 BSOP - Bidirectional, Slab Gate, Cast Body
h) Injectable packing can be energized into the valve bonnet stuffing box under pressure.
j) Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication.

Model FM4 RC BSOP - Bidirectional, Slab Gate, Forged Body

Model FM4 RC BSOP - Bidirectional, Slab Gate, Forged Body
h) Injectable packing can be energized into the valve bonnet stuffing box under pressure.
j) Valve bonnet / ball screw housing (where applicable) equipped with grease port(s) and fitting(s) for bearing lubrication.

Last Updated: 08/28/2017

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.