Description

API 599 / API 6D Lubricated Plug Valve Technical Data Sheet

(Carbon Steel Body, 304 Trim, PTFE Seals, Wrench Operated)

1. Product Overview

Item	Description
Product Type	Lubricated Plug Valve / Non-Lubricated Plug Valve (Sleeved Type)
Design Standard	API 599 (Metal Plug Valves – Flanged, Threaded, and Welding Ends) API 6D (Pipeline Valves)
Body Material	Carbon Steel (ASTM A216 WCB / A105)
Trim Material	304 Stainless Steel (Plug, Stem, Seats)
Sealing Material	PTFE (Polytetrafluoroethylene) – for sleeve / seat seals
Operation	Wrench Operated (Lever / T-bar)
Connection Type	Flanged Ends (RF / RTJ)
Nominal Size	NPS 1/2″ ~ 24″ (DN15 ~ DN600)
Pressure Class	Class 150 ~ Class 300 (Class 600 available on request)
End Flanges	ASME B16.5 (RF / RTJ)
Face-to-Face Dimensions	ASME B16.10 / API 6D (Long pattern or Short pattern)
Testing Standard	API 598 / API 6D / ISO 5208
Fire-Safe Design	API 607 / API 6FA (optional)
Anti-Static Device	Yes (per API 6D)
Blowout-Proof Stem	Yes

2. Applicable Standards & Specifications

Item	Standard
Design & Manufacturing	API 599 (Metal Plug Valves), API 6D (Pipeline Valves), ASME B16.34
Face-to-Face Dimensions	ASME B16.10, API 6D
Flange End Dimensions	ASME B16.5 (RF / RTJ)
Butt-Weld Ends	ASME B16.25 (if applicable)
Pressure-Temperature Rating	ASME B16.34
Material Requirements	ASTM A216 WCB (Body), ASTM A182 F304 (Trim)
NACE Requirements	NACE MR0175 / ISO 15156 (optional for sour service)
Testing & Inspection	API 598, API 6D, ISO 5208
Fire-Safe Test	API 607, API 6FA (optional)
Low Emission Requirements	ISO 15848, TA-Luft (optional)

3. Main Technical Parameters

Item	Parameter Range / Description
Pressure Class	Class 150, Class 300 (Class 600 available on request)
Shell Test Pressure	1.5 x Rated Working Pressure (per API 598)
Seat Test Pressure (High Pressure)	1.1 x Rated Working Pressure (per API 598)
Seat Test Pressure (Low Pressure)	40 ~ 80 psi (per API 6D)
Applicable Media	Water, Oil, Natural Gas, Air, Non-aggressive Chemicals, etc.
Working Temperature	-29°C ~ +120°C (PTFE seals) Higher temperatures available with alternative seat materials
Structure Type	Lubricated Plug / Non-Lubricated Sleeved Plug
Port Type	Full Port / Regular Port / Venturi Port
Flow Direction	Bidirectional (standard)
Leakage Class	API 598 / ISO 5208 Rate A (Zero detectable leakage)
Operation	Wrench Operated (Lever / T-bar) – Suitable for smaller sizes and lower torques
Wrench Type	Lever handle (with locking device optional) / T-bar handle
Position Indication	Lever position indicates open/closed (90° operation)
Fire-Safe Design	Optional per API 607
Anti-Static Device	Springs between plug and stem / body ensure electrical continuity (<10 ohms)
Blowout-Proof Stem	Stem designed with integral collar to prevent ejection under pressure
Cavity Relief	Automatic cavity pressure relief (self-relieving)

4. Material of Construction

4.1 Standard Material Specifications

Part Name	Material	Specification / Notes
Body	Carbon Steel	ASTM A216 WCB (cast) or ASTM A105 (forged for smaller sizes)
Bonnet / Cover	Carbon Steel	ASTM A216 WCB / A105
Plug	304 Stainless Steel	ASTM A182 F304 / CF8 (cast) – Hard chrome plated optional
Stem	304 Stainless Steel	ASTM A182 F304
Seat / Sleeve	PTFE (Virgin / Reinforced)	Molded or machined PTFE sleeve (for non-lubricated type)
Body Gasket	PTFE / Spiral Wound 304+Graphite	PTFE for standard service; Spiral wound for higher temp
Stem Seals	PTFE / Viton / Graphite	PTFE standard; Viton for higher temp
Thrust Washer	PTFE / Bronze	Prevents metal-to-metal contact
Gland / Adjuster	Carbon Steel / 304 SS	For packing adjustment
Bolting (Studs/Nuts)	A193 B7 / A194 2H	Carbon steel bolting
Handle / Wrench	Malleable Iron / Fabricated Steel	Epoxy coated or galvanized
Anti-Static Device	304 Stainless Steel springs/balls	Between plug-stem and stem-body

4.2 Optional Materials

Part	Material Option	Application
Body	ASTM A352 LCB / LCC	Low temperature service (-46°C)
Plug	316 Stainless Steel / Duplex / Monel	Corrosive service
Stem	316 Stainless Steel / 17-4 PH / Monel	Corrosive / high strength
Seat / Sleeve	Reinforced PTFE (R-PTFE) / UHMWPE / PEEK	Higher pressure / temperature
Stem Seals	Viton / Graphite / PTFE blends	Higher temperature / chemical resistance

5. Structural Features & Working Principle

5.1 Design Features

Feature	Description
API 599 / API 6D Compliant	Designed, manufactured, and tested in full compliance with API 599 (plug valve specific) and API 6D (pipeline valve) standards, ensuring reliability in critical service .
Carbon Steel Body	ASTM A216 WCB carbon steel body provides excellent strength, toughness, and cost-effectiveness for general industrial and pipeline applications .
304 Stainless Steel Trim	Plug and stem manufactured from 304 stainless steel offer superior corrosion resistance compared to carbon steel trim, ensuring long service life and smooth operation .
PTFE Sealing	PTFE sleeve (for non-lubricated type) or PTFE seat inserts provide bubble-tight sealing, low operating torque, and excellent chemical resistance .
Wrench Operation	Lever or T-bar handle provides direct 90° operation for quick open/close; suitable for smaller sizes (typically up to NPS 6-8 depending on torque) .
Floating Plug Design	Line pressure forces the plug against the downstream seat, enhancing seal tightness (pressure-energized) .
Bidirectional Flow	Standard design allows installation in either flow direction without modification .
Anti-Static Device	Springs between plug and stem, and between stem and body, ensure electrical continuity (<10 ohms resistance), preventing spark generation in flammable environments .
Blowout-Proof Stem	Stem is retained by the bonnet/cover with integral collar, preventing stem ejection under pressure .
Self-Relieving Cavity	Plug design allows cavity pressure to self-relieve to line pressure, preventing over-pressurization .
Locking Device	Optional locking arrangement on handle allows valve to be locked in open or closed position .

5.2 Working Principle

Closed Position: Plug rotated 90° such that the port in the plug is perpendicular to the flow path. The PTFE sleeve/seat provides bubble-tight seal.
Opening: Rotating the wrench 90° aligns the plug port with the flow path, allowing full flow.
Sealing: Line pressure forces the plug against the downstream seat (pressure-energized), enhancing seal tightness as pressure increases.
Lubrication (Lubricated Type) : For lubricated plug valves, sealant injected into the valve body coats the plug and seat, providing sealing and reducing operating torque.

6. PTFE Seal Features

Property	Description
Material	Virgin PTFE / Reinforced PTFE (R-PTFE) / Glass-Filled PTFE
Temperature Range	-29°C ~ +120°C (Virgin PTFE) -29°C ~ +150°C (Reinforced PTFE)
Pressure Rating	Full Class 150/300 rating within temperature limits
Chemical Resistance	Excellent resistance to most chemicals, acids, and solvents
Friction Coefficient	Very low (0.05-0.10) – provides smooth operation and low torque
Sealing Performance	Bubble-tight shut-off (ISO 5208 Rate A / API 598)
Seat Design	Moulded or machined sleeve fully lined in body; or separate seat inserts

7. Wrench Operation Details

Feature	Description
Operation Type	Direct-mounted lever or T-bar wrench
Rotation Angle	90° (quarter-turn) from fully open to fully closed
Position Indication	Handle position indicates valve status: – Handle parallel to pipe = OPEN – Handle perpendicular to pipe = CLOSED
Torque Capacity	Suitable for valves up to certain size/torque; gear operator recommended for larger sizes or higher pressure classes
Locking Device	Optional pin or latch to lock handle in open/closed position
Handle Material	Malleable iron / fabricated steel (epoxy coated or galvanized)
Handle Length	Designed to provide adequate mechanical advantage for manual operation
Optional Features	Padlockable handle, chainwheel attachment, extension stem for buried service

8. Dimensional Data

Note: Dimensions are for reference only. Final dimensions vary by manufacturer, pressure class, and port type. Consult GA drawing for final approval.

8.1 Face-to-Face Dimensions (L) – ASME B16.10 / API 6D (Long Pattern)

NPS	DN	Class 150 (mm)	Class 300 (mm)	Class 600 (mm)*
1/2″	15	108	152	165
3/4″	20	117	178	190
1″	25	127	203	216
1-1/4″	32	140	216	229
1-1/2″	40	165	229	241
2″	50	178	267	292
2-1/2″	65	190	292	330
3″	80	203	318	356
4″	100	229	356	432
6″	150	394	444	559
8″	200	457	533	660
10″	250	533	622	787
12″	300	610	711	838
14″	350	686	838	889
16″	400	762	864	991
18″	450	864	978	1092
20″	500	914	1016	1194
24″	600	1067	1168	1397

** Class 600 available on request; consult manufacturer for availability and dimensions.*

8.2 Overall Dimensions (Approximate) – Wrench Operated

NPS	DN	Class 150	Class 300
		Height (H) mm	Handle Length (mm)	Height (H) mm	Handle Length (mm)
1/2″	15	150	120	160	120
3/4″	20	160	120	170	120
1″	25	180	150	190	150
1-1/4″	32	200	150	210	150
1-1/2″	40	220	200	230	200
2″	50	250	200	270	200
2-1/2″	65	280	250	300	250
3″	80	310	250	330	250
4″	100	350	300	380	300
6″	150	450	400	500	400
8″	200	550	500	600	500

Note: For sizes above NPS 8, gear operator is typically recommended due to higher operating torque.

8.3 Flange Dimensions (ASME B16.5 Class 150/300 RF)

NPS	DN	Class 150	Class 300
		Flange OD (mm)	Bolt Circle (mm)	Bolt Holes	Flange OD (mm)	Bolt Circle (mm)	Bolt Holes
1/2″	15	90	60.3	4-5/8″	95	66.7	4-5/8″
3/4″	20	100	69.9	4-5/8″	115	82.6	4-3/4″
1″	25	110	79.4	4-5/8″	125	88.9	4-3/4″
1-1/4″	32	115	88.9	4-5/8″	135	98.4	4-3/4″
1-1/2″	40	125	98.4	4-5/8″	155	114.3	4-7/8″
2″	50	150	120.7	4-3/4″	165	127.0	8-5/8″
2-1/2″	65	180	139.7	4-3/4″	190	149.4	8-3/4″
3″	80	190	152.4	4-3/4″	210	168.3	8-7/8″
4″	100	230	190.5	8-3/4″	255	200.2	8-7/8″
6″	150	280	241.3	8-7/8″	320	269.9	12-7/8″
8″	200	345	298.5	8-7/8″	380	330.2	12-1″
10″	250	405	362.0	12-1″	445	387.4	16-1-1/8″
12″	300	485	431.8	12-1-1/8″	520	450.9	16-1-1/4″

9. Testing & Inspection (Per API 598 / API 6D)

Test Type	Test Medium	Test Pressure	Duration	Acceptance Criteria
Shell Test (Hydrostatic)	Water (with corrosion inhibitor)	1.5 x Rated Pressure	NPS ≤ 2″: 15 sec NPS 2.5-6″: 60 sec NPS 8-18″: 120 sec	No visible leakage through pressure boundary
Seat Test (High Pressure)	Water / Air (optional)	1.1 x Rated Pressure	Same as above	No visible leakage through seat
Seat Test (Low Pressure)	Air / Nitrogen	40-80 psi (2.8-5.6 bar)	Same as above	Bubble-tight (zero bubbles)
Backseat Test	Air / Nitrogen	Rated Pressure	15-30 sec	No leakage past stem seals

Optional Tests:

NDT (Non-Destructive Testing): UT, MT, PT on body/bonnet
PMI (Positive Material Identification) on all pressure-containing parts
Fire-safe test per API 607
Low emission test per ISO 15848
NACE MR0175 / ISO 15156 material verification
Hydrostatic test with traceable chart recorder

10. Installation, Operation & Maintenance Instructions

10.1 Pre-Installation

Remove protective covers from flanges .
Clean valve interior to remove any debris, oil, or preservatives .
Verify pressure class, material, and trim match service requirements .
Check wrench operation (full 90° open/close) to ensure smooth movement .
Inspect flange faces and RTJ grooves (if applicable) for damage .

10.2 Installation

Ensure pipeline is clean and free from debris, weld slag, and scale .
Install valve with wrench handle in accessible position .
Flow direction: Bidirectional – valve can be installed in either direction .
Use appropriate gaskets (spiral wound for RF, ring joint for RTJ flanges) .
Support piping adequately to avoid stress on valve flanges .
Tighten flange bolts evenly in crisscross pattern to recommended torque .
For buried service, consider extension stem and valve box .

10.3 Operation

Opening: Rotate wrench 90° counter-clockwise (typically) until handle is parallel to pipe .
Closing: Rotate wrench 90° clockwise until handle is perpendicular to pipe .
Position Indication: Handle position clearly indicates valve status .
Do not use pipe extensions or hammers on wrench for additional leverage .
For valves with higher torque (larger sizes), consider gear operator .
Locking: Optional locking device can secure valve in open/closed position .

10.4 Maintenance

Periodic Inspection:
- Check for external leakage (body joints, stem seals) .
- Verify smooth operation – cycle valve periodically to prevent sticking .
- Check handle and locking mechanism .
Packing Adjustment:
- If slight stem leakage occurs, evenly tighten gland nuts .
- Do not overtighten .
Seat Replacement (Non-Lubricated Sleeved Type) :
- Depressurize valve completely before disassembly .
- Remove bonnet/cover bolts and lift bonnet/stem/plug assembly .
- Remove worn PTFE sleeve/seats .
- Install new PTFE sleeve/seats (OEM recommended) .
- Reassemble and torque bonnet bolts to specification .
- Retest valve per API 598 before returning to service .
Lubrication (Lubricated Type) :
- Inject fresh sealant through lubricant fittings as recommended .
- Cycle valve after lubrication to distribute sealant .
Spare Parts: Recommended spare parts include PTFE sleeve/seats, stem seals, gaskets, and handle components .

11. Ordering Information

When ordering API 599 / API 6D Plug Valves (Carbon Steel, 304 Trim, PTFE Seals, Wrench Operated), please specify:

Item	Description
1. Valve Type	Plug Valve (Lubricated / Non-Lubricated Sleeved)
2. Design Standard	API 599 / API 6D
3. Nominal Size	NPS ___ (DN ___)
4. Pressure Class	Class 150 / Class 300 / Class 600
5. Body Material	ASTM A216 WCB (Carbon Steel)
6. Trim Material	304 Stainless Steel (Plug, Stem)
7. Seat / Sleeve Material	PTFE (Virgin / Reinforced)
8. Connection Type	Flanged (RF / RTJ) per ASME B16.5
9. Port Type	Full Port / Regular Port / Venturi Port
10. Operation	Wrench Operated (Lever / T-bar)
11. Face-to-Face Standard	ASME B16.10 / API 6D (Long Pattern / Short Pattern)
12. Special Requirements	– Fire-Safe Design (API 607 / API 6FA) – NACE MR0175 / ISO 15156 compliance – Anti-Static Device (standard) – Locking Device on handle – Low Emission Packing (ISO 15848) – NDT (UT/MT/PT) requirements – PMI testing – Special painting / coating
13. Quantity	___ units

12. Available Options

Option	Description
Fire-Safe Design	Per API 607 / API 6FA – secondary metal-to-metal seal activates if PTFE is destroyed
NACE Compliance	Materials certified per NACE MR0175 / ISO 15156 for sour service
Low Temperature Service	Body material ASTM A352 LCB/LCC, impact testing at -46°C
Gear Operator	For larger sizes or higher torque requirements
Chainwheel Operation	For overhead installation
Extension Stem	For buried service or insulated piping
Locking Device	Padlockable handle for safety lockout/tagout
Position Indicator	Additional visual or remote position indication
Oxygen Cleaning	For oxygen service – special cleaning and packaging
Special Coatings	Epoxy, zinc-rich, or other coatings per project specification

Note: This technical data sheet is a general guideline for API 599 / API 6D Plug Valves with Carbon Steel Body, 304 Stainless Steel Trim, PTFE Seals, and Wrench Operation. For specific project requirements, including detailed material selection, pressure class, and dimensions, please refer to the approved manufacturer’s drawing and purchase order. Specifications are subject to change without notice.

2-Way Lubricated Plug Valve