ANSI Stainless Steel F304/F316 Flanged Lever/Gear Double Block and Bleed Ball Valve

Specification

Product description

Material	A105/Stainless Steel/Duplex steel/Aluminium Bronze/Nickel-aluminum Bronze/Titanium Alloy, etc.
Size	2″-20″(DN50-DN500)
Port	Full Port/Reduce Port
Working Pressure	150LB/300LB/600LB/900LB/1500LB/2500LB
Connection Ends	RF, RTJ, BW,NPT
Working Temp.	-20ºC~280ºC for soft seat, -196ºC to 600ºC for metal seat
Suitable Medium	Water, Natural Gas, Oil and some corrosive liquid
Operated	Manual, Worm Gear, Pneumatic actuator, Electric Actuator
Features	Fire safe, anti-static device
Design standard	ASME B16.34,API608,API6D
Inspection & Testing	According to API598
Brand	TIANYU-VALVES/OEM

Testing Pressure(Mpa)

Pressure	150LB	300LB	600LB	900LB	1500LB	2500LB
Strength Testing	3.0	7.5	15.4	23.0	37.5	63.0	Mpa
Seal Testing	2.2	5.5	11.2	16.9	27.5	46.2
Air Testing	0.6	0.6	0.6	0.6	0.6	0.6

Product Overview

TIANYU ANSI 2″ 150LB Stainless Steel Double Block and Bleed Ball Valve: Precision Solution for Industrial Fluid Safety Control

I. Technical Overview

The TIANYU ANSI 2″ 150LB Stainless Steel Double Block and Bleed (DDB) Ball Valve is a high-performance shut-off device designed for medium-low pressure pipeline systems. Featuring AISI 304/316 stainless steel forged body and floating ball structure, it ensures dual seat sealing and cavity pressure relief, blocking upstream/downstream media while releasing internal pressure. With 2″ (DN50) size, 150LB (PN20) rating, and -20℃~180℃ operating range, it suits non-corrosive/weakly corrosive media like water, steam, oil, and natural gas, widely used in petrochemical, food-pharmaceutical, water treatment, and HVAC sectors. Compliant with ASME B16.34, API 6D, and ISO 5211, it supports manual/electric/pneumatic operation for reliable fluid control.

II. Core Product Features

(A) Double Block and Bleed (DDB) Design

Bidirectional Sealing: Independent PTFE seats with spring preloading ensure bidirectional bubble-tight sealing (leakage ≤1×10⁻⁹m³/s), meeting API 598 Class IV. Blocks media under pressure simultaneously;
Safety Pressure Relief: Central bleed port enables online pressure release, eliminating overpressure risks for hot work and pipeline maintenance;
Floating Ball Structure: Unsupported ball self-compresses against seats via medium pressure, enhancing low-pressure sealing reliability by 25% and reducing operation torque by 15%.

(B) Material & Application Compatibility

Component	Material	Key Advantage	Media Compatibility
Body/Ball	AISI 304/316 SS	Tensile ≥515MPa, intergranular corrosion resistance	Drinking water, steam, oil, natural gas
Seat	PTFE+Carbon Fiber	-20℃~180℃ resistance, anti-creep wear	Weak acids/alkalis, food-grade media
Stem	316 SS	HRC20-25 hardness, blowout-proof (ASME B16.34)	Wet environments, mildly corrosive media
Seals	Viton Fluororubber	Chemical resistance, ≤10% compression set	Weak acids/alkalis, oil, steam condensate

(C) Operation & Maintenance

Reliable Manual Drive: Standard extended lever handle (≤80N·m torque), optional gearbox (1:3 ratio) for effortless operation in frequent cycles;
Quick-Disassembly Design: 12-point symmetric bolted bonnet allows 10-min seal replacement, improving maintenance efficiency by 30% for online servicing.

III. Technical Specs & Manufacturing

(A) Key Performance Indicators

Pressure/Temp Range:
- Pressure: 150LB (PN20, max 2.0MPa);
- Temperature: -20℃~180℃ (standard), optional -40℃~200℃ (cryogenic);
Bore & Flow:
- 2″ full bore (DN50), Cv=100, 20% lower pressure drop than reduced-bore valves;
Testing Standards:
- Hydrostatic: 1.5x pressure (15-min hold);
- Gas-tight: 1.1x pressure (nitrogen, ≤1×10⁻⁹m³/s leakage).

(B) Precision Manufacturing

Stainless Steel Forging:
- Body forged from AOD-refined SS billet (C≤0.08%) via 1000-ton press (forging ratio ≥3:1), achieving ASTM No.7+ grain size;
- Ball turned by CNC lathe to ≤0.01mm roundness, ≤0.02mm fit with seats for sealing precision.
Surface Treatments:
- Mechanical polished interior (Ra≤1.6μm) reduces media deposition;
- Passivated exterior (ASTM A967), electropolished (Ra≤0.8μm) for food-grade applications.
Quality Control:
- 100% magnetic particle inspection (MT) for surface defects;
- 50,000-cycle testing with ≥95% sealing retention (Far beyond the industry 30,000 cycles).

Valve Details

IV. Applications & Industry Value

(A) Typical Industrial Uses

Petrochemical:
- Oil loading/unloading pipeline isolation: 316 SS valves last 5 years in sulfurous crude, supporting live maintenance;
- Reactor inlet/outlet control: DDB function ensures maintenance safety, minimizing media leakage.
Food & Pharmaceutical:
- Beverage CIP systems: 304 electropolished valves meet FDA standards, no media retention;
- Pharmaceutical steam sterilization: PTFE seals withstand 134℃, reducing leakage incidents by 85% annually.
Water Treatment & HVAC:
- Building HVAC water systems: Extended lever for easy operation, 5% higher energy efficiency;
- WWTP sludge transport: 316 SS resists chloride corrosion, 3-year trouble-free operation.

(B) Customer Benefits

Safety Compliance: CE-PED, ASME certified, meeting ISO 9001 and TSG D0001 to reduce compliance risks;
Cost Optimization: Streamlined flow saves ~8,000kWh/year, 18-month maintenance cycles cut total cost by 25%;
Customization: Non-standard flanges (DIN/JIS), special seals (EPDM/FFKM), and ATEX-explosion proof actuators available.