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The Valtek XL Series (XL and XL90), two-stage positioners offer fast and sensitive dynamic response characteristics to meet extremely demanding control objectives. The positioners are available with either an electro-pneumatic (I/P) transducer module for milliamp current control signals or a pneumatic module for aircontrol signals. Designed for high performance, these positioners are field reversible and ruggedly built for reliability in severe industrial environments.
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The Vahn-Tech Series VT-SX Explosion Proof Spring-Return Fail-Safe Electric Actuators in addition to the normal function (floating control, on-off control, modulating control) are designed to provide fail-safe positioning of valves and dampers upon loss of power supply. A mechanical spring set is used to position the controlled device to either the fully OPEN or fully CLOSED position without any external power source. For ON-OFF type, a mechanical buffer is employed at the end of the spring stroke in order to reduce the dynamic effects of the spring return system. A clutch-free manual override is available as an option for standard units to provide full-time manual positioning of the valve.
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The Vahn-Tech Series VT-S Spring-Return Fail-Safe Electric Actuators in addition to the normal function (floating control, on-off control, modulating control) are designed to provide fail-safe positioning of valves and dampers upon loss of power supply. A mechanical spring set is used to position the controlled device to either the fully OPEN or fully CLOSED position without any external power source. For ON-OFF type, a mechanical buffer is employed at the end of the spring stroke in order to reduce the dynamic effects of the spring return system. A clutch-free manual override is available as an option for standard units to provide full-time manual positioning of the valve.
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The Vahn-Tech Series VT-OMX Explosion Proof Electric Actuators offer torque ranges from 35 Nm to 1,500 Nm (310 in-lb to 13,280 in-lb). All models are ISO 5211 compliant and are equipped with a visual position indicator. The manual override can be operated without clutch and brake. VT-OMX series explosion-proof quarter-turn electric actuators are structured as flame-proof and combustible dust-proof. The directive and standards marking are II2GD Ex db IIB T4 Gb, Ex tb IIIC T130°C Db. They are classified as Zone 1 or Zone 2, containing Group II A and Group II B gases, Zone 21 or Zone 22, containing combustible dust atmospheres or explosive gas atmospheres and combustible dust atmospheres. Temperature group T1 to T4.
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The Valtek VR rotary cylinder actuator is a high pressure, compact actuator with high torque and pneumatic stiffness for excellent throttling capabilities. The standard splined shaft connection eliminates backlash for precise control. Designed for supply air pressures to 150 psi (10.3 Bar) to eliminate the need for a pressure regulator. The high stiffness provides firm control from 0 to 90 degrees.
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Valtek VL series spring cylinder linear actuators are powerful, compact, high-performance pneumatic actuators that provide solid throttling or on-off operation for automatic control valves. The positioner supplies air to both sides of the piston, providing stiff, precise movement and high-frequency response and quick stroke speeds.
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The Valdisk TX3 is a high performance triple offset butterfly control valve capable of closing with zero leakage. The precision seat and seal are machined at an offset angle creating even seat loading around the entire seat ring and eliminating rubbing between the seat and seal during opening and throttling. This design provides repeatable long-lasting zero leakage shut-off.
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The Valtek Valdisk valve is a high-performance butterfly control valve. Its double-offset shaft provides eccentric-cammed disc rotation to lift it out of the seat, thus immediately eliminating seat friction, to improve throttling control and reduce seat wear. A one-piece splined shaft connected to a clamped actuator lever provides excellent throttling control. Its soft seating arrangement is designed for bubble-tight shutoff while maintaining low breakout torque.
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The Schuck Type U ball valve is designed for pipelines and systems handling highly demanding operating conditions and high-maintenance media. The valve is suitable for natural gas, oil, and water applications.
- Minimum Temperature: -60 ° C to 80 ° C
- Normal Temperature: -29 ° C to 120 ° C
- High Temperature: -29 ° C to 160 ° C
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Durable, easy-to-maintain split body ball valve for gas, oil, and water pipeline systems. It features a modular design for extensive maintenance and allows for wearing part replacement without demounting the valve. The temperature ranges include:
- Minimum: -60°C to 120°C
- Standard: -29°C to 120°C
- Maximum: -29°C to 200°C
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Ever since its introduction back in the 1980s, NAF Turnex has proven its unique features and maintenance-free operation. The robust linkage system with bushing provides an optimum torque curve for quarter turn valves and eliminates play. This makes it ideal for rotary control applications. NAF Turnex is an integrated part in the NAF control valve package with a unique direct mounting concept. The actuator is also used for on/off service and has adjustable end-stops in both directions. Ever since we developed this state-of-the-art actuator the spare parts have been the same. This, combined with a unique system of sleeves, for different stem diameters, minimizes the number of spare parts.
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The NAF Trunnball DL is a full-bore trunnion-mounted ball valve, developed by Flowserve engineers with more than 80 years of experience manufacturing ball valves. The ball is supported by two large, low friction trunnion bearings for consistent low torque even at high differential pressures. Due to its bi-directional tightness, low friction and high controllability, it is an excellent choice for isolation, on/off and modulating control applications.
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The NAF Trunnball DL is a full-bore trunnion-mounted ball valve, developed by Flowserve engineers with more than 80 years of experience manufacturing ball valves. The ball is supported by two large, low friction trunnion bearings for consistent low torque even at high differential pressures. Due to its bi-directional tightness, low friction and high controllability, it is an excellent choice for isolation, on/off and modulating control applications.