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Reducing Flanged Double Block and Bleed Twin Ball Valve
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Reducing Flanged Double Block and Bleed Twin Ball Valve

Size: 1"–36" (DN25–DN900, larger sizes on request)
Pressure Rating: Class 300 / 600 / 900 / 1500 / 2500
Operating Temperature: –45°C to +250°C (depends on body & seat material)
Ball Type: Trunnion-Mounted Twin Ball
Body Construction: 1–3 Piece Integrated
Body Sealing: True Double Block & Bleed (DBB) with central bleed cavity
End Connection: Reducing Flanged Ends (one side larger, one side smaller); RF / RTJ
Operation: Dual Manual Handles (Worm Gear); Pneumatic & Electric optional
Mounting: ISO 5211 Direct Mounting
Material: Forged Steel (A105/WCB/1.0619), Stainless Steel (F316/F316L), Duplex & Super Duplex optional
Brand: SLVCN
Availability:
Quantity:
  • SLVCN

Reduce Flanged Twin Ball DBB Valve

Product Description

The SLVCN Reducing Flanged Twin Ball Double Block & Bleed (DBB) Valve delivers a compact, engineered solution combining true DBB isolation with smooth pipeline diameter transition. The twin trunnion-mounted balls provide independent upstream and downstream sealing, while the central bleed port allows safe pressure release and operational verification. Reducing flanged ends remove the need for separate reducers, simplifying installation and minimizing leak paths.


This valve is ideal for Oil & Gas, Chemical, Petrochemical, and skid-mounted process systems. Fully customizable in size, pressure class, body material, and seat options, it guarantees long-term reliability, safety, and high-performance under demanding conditions.


Key Features

✓ Integrated Reducing-End Design

Smooth pipeline diameter transition without additional reducers.


✓ Twin Trunnion-Mounted Balls

Double isolation for upstream & downstream, ensuring verified sealing.


✓ Central Bleed Port

Enables safe depressurization and on-site leakage verification.


✓ Compact One-Body Construction

Minimizes space requirements for tight or skid-mounted installations.

✓ Heavy-Duty Flanged Ends

Secure sealing under high-pressure and critical service conditions.


✓ Fire-Safe, Anti-Static, Anti-Blowout Stem

Protects critical process systems under extreme conditions.

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  Tel: +86-180-6165-9285
  Phone: +86-25-5885-5535
  E-mail: info@slv-cn.com
  Address: No.22, Liuzhou North Road, Pukou District, Nanjing, Jiangsu, China

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