Needle Valves for Precise Flow Control and Isolation

When you turn the handle, the stem moves toward or away from the seat in small, controlled steps. A partly open valve meter flows precisely. A fully closed valve gives positive shutoff. Every BuTech design is built to deliver both functions repeatably:

• A non-rotating stem tip presses straight onto the seat without twisting. This prevents galling and scoring, so shutoff stays tight cycle after cycle.
• A 17-4PH stem is hardened for a longer service life.
• Glass-filled PTFE packing is rated to 600°F (315°C). Optional packings and extended stuffing boxes extend the range from -423°F to +1,200°F (-253°C to +648°C).
• A positive gland locking device keeps the packing secure under vibration.

The stem tip determines how the valve behaves:

• Vee stem: fast, positive shutoff for on/off isolation
• Regulating stem: smooth, progressive flow adjustment
• Metering stem: fine control of low flow rates
• Micro-metering stem: the finest adjustment, for very low flow
• Soft tip: a resilient seat for bubble-tight shutoff on gases (available on NPT pipe valves)

You can choose 2-way straight or angle patterns. Angle patterns increase flow capacity (Cv) by about 50%.

Key Features

• Precise metering and positive shutoff in one valve
• Pressure ratings up to 150,000 psi (10,340 bar)
• Non-rotating stem tip that prevents galling and scoring
• Five stem styles, in straight and angle patterns
• Cold-worked 316 stainless steel as standard. Hastelloy, Inconel, Titanium, Monel 400 or any machinable metal on request
• NPT and cone-and-thread connections
• Built-in mounting holes, with a panel-mount option
• Dedicated hydrogen, sour gas and subsea designs