Parallel Gate Valve F91 Open Die Forged—16″ 1500 BW

Description

Parallel Gate Valve F91 Open Die Forged — 16″ 1500 BW

TECHNICAL DATA SHEET

1. General Description

16-inch, Class 1500, pressure seal bonnet, parallel disc gate valve with butt-weld ends. Body is open die forged from ASTM A182 F91, designed for severe high-temperature, high-pressure service. Parallel twin-disc design ensures reliable bi-directional sealing with low operating torque and no thermal wedging risk.

2. Applicable Standards & Codes

Item Standard / Code
Design & Manufacture ASME B16.34, API 600
Pressure-Temperature Ratings ASME B16.34 (F91 material group)
Face-to-Face ASME B16.10 (Long Pattern)
Butt-Weld Ends ASME B16.25
Inspection & Testing API 598, API 600
Pressure Seal Bonnet Manufacturer’s standard, ASME B16.34 compliant
Materials ASTM A182 F91 (Open Die Forged), ASME BPVC Sec. II
3. Main Technical Parameters

Parameter Description
Nominal Size 16 inch (DN 400)
Pressure Class Class 1500
Body Material ASTM A182 F91 (Open Die Forged)
End Connection Butt-Weld (BW) per ASME B16.25, SCH 160/XXS
Bonnet Type Pressure Seal (Self-Sealing)
Disc Type Parallel twin disc, spring-energized
Operation Handwheel / Bevel gear (standard); actuator optional
Flow Direction Bi-directional
Service Media Steam, boiler feed water, high-temp oil, non-corrosive fluids
Operating Temp. Range -29 °C to 620 °C
Hydrostatic Test (ambient) Shell: 38.7 MPa.g; Seat: 28.3 MPa.g
Leakage Class Zero leakage (Stellite hardfaced, API 598)
4. Typical Bill of Materials

No. Part Name Material Remarks
1 Body ASTM A182 F91 Open Die Forged, N+T
2 Bonnet ASTM A182 F91 Open Die Forged, N+T
3 Disc ASTM A182 F91 Stellite Gr.6/HF hardfaced
4 Seat Ring ASTM A182 F91 Renewable, Stellite Gr.6
5 Stem ASTM A479 Gr.91 / A182 F91 Nitrided or chrome plated
6 Pressure Seal Ring High-purity graphite + SS reinforced Self-sealing, 650 °C
7 Bonnet Retainer Ring ASTM A182 F91 / High-strength alloy Machined
8 Packing High-purity flexible graphite Die-formed rings
9 Gland & Flange ASTM A182 F91 Self-aligning
10 Yoke ASTM A216 WCB or A182 F91 Rigid
11 Stem Nut Copper Alloy / Steel self-lubricated With grease fitting
12 Spreader Spring Inconel X-750
13 Fasteners ASTM A193 B16 / A194 Gr.4
5. Approximate Dimensions & Weight

Specification Unit Value
Size inch (mm) 16 (DN400)
Face-to-Face (L) mm 1524
Max. Body OD mm Approx. 1060
Height (Open) mm Approx. 3050
Handwheel Dia. mm Approx. 1000
Stem Dia. mm Approx. 76
BW End Match – 406.4 mm OD × SCH 160 / XXS
Approx. Weight kg Approx. 5,200 (manual gear)
6. Design Features

Open die forged body for superior creep and fatigue resistance.
F91 material for service up to 620 °C.
Pressure seal bonnet with graphite composite ring.
Parallel twin-disc, spring-energized, zero leakage, no thermal seizure.
Fully guided discs for extended seat life.
Renewable Stellite hardfaced seats.
Blow-out proof stem (API 600).
Long-life graphite packing system.
7. Pressure-Temperature Ratings (ASME B16.34, F91, Class 1500)

Temp. (°C) MAWP (MPa.g)
-29 ~ 38 25.8
100 25.8
200 24.8
300 23.1
400 21.6
500 19.8
550 16.2
600 10.9
620 9.0
8. Inspection, Testing & Documentation

100% hydro test per API 598.
Chemical & mechanical reports for forgings.
Optional UT, PT, RT.
Standard docs: material certs, test reports, CoC, I&M manual. EN 10204 3.1/3.2 available.
Cleaned, degreased, end-protected.
9. Typical Applications

USC power plant main steam & hot reheat isolation
Combined cycle plant high-temp reheat
Refinery/petrochemical hydrogenation & reforming
Nuclear conventional island steam systems
CSP molten salt/steam isolation
10. Additional Selection Notes

Operation: Bevel gear standard. For actuated versions, specify details.
Bypass: Recommended for pressure equalization.
Purge/Drain: Optional.
Mating Pipe: Confirm bevel dimensions at order.