TEC gate valves are designed to successfully meet customer demands for performance, endurance, ease of maintenance and cost-effectiveness. TEC valves meet or exceed the requirements of API Specifications 6A, 6A SSV/USV and 17D with working pressures from 2, 000 to 20, 000 psi. The trims come in for all types of oil and gas service. These valves are available in sizes from 2 1/6" to 4 1/6", in a temperature range from -60 deg. C to +120 deg. C (-75 deg. F to +250 deg. F), and qualifies by API 6A PR2 App F.
The floating seat allows bi-directional use, quick and easy field repair and low torque for opening/closing. The one-piece precision-machined floating slab gate utilizes floating seats that co-opt line pressure to supply the sealing force. Excessive force is not required for closing and sealing and smooth operation can be assured during extreme thermal cycles. Selective Backseat provides unparalleled safety during venting, lubrication, allows stem packing replacement without removing valve from service. A routine maintenance program keeps repairs to a minimum, and vital valve components may be replaced when necessary without the use of special tools.
Features & Benefits
1. Metal-to-Metal Seals
Seat-to-gate Seat-to-body Bonnet/bonnet Stem backseat
2. Seat to Body Seal
Inert, spring-loaded, pressure-energized lip seals which are installed between each seat and body. These seals assist in low-pressure sealing and protect the body and seal areas from particle contaminants.
3. Selective Backseat
Provides unparalleled safety during venting, lubrication, and stem packing replacement
Premature backseating is prevented by a positive stop in the bearing cap that controls stem travel.
This design feature also protects the metal-to-metal sealing surface
Allows stem packing replacement without removing valve from service
Backseat can be employed without shifting position of the gate
4. Full Bore through conduit design
5. QPQ treatment, tungsten carbide coating and lapping on gate and seat provide extended life expectancy
6. Stem packing is unaffected by H2S, CO2, amines and chlorides
7. Stem Shear Pin Protects valve stem from being damaged due to excessive torque
8. Non-rising Stem Reduces tearing of stem packing; ACME thread enhances durability and lowers torque requirements
9. Heavy duty bearing (tapered roller bearing) for low torque and easy operation
10. Threaded Packing Gland
Transfers stem packing loads to the bonnet, protecting the bearing assemblies and allowing replacement of bearings and shear pin at full pressure differential
TEC Gate Valve Trim Chart |
Service Conditions | API Trims | Body & Bonnet | Gates & Seats | Stem | Bonnet Gasket seal |
General Service Non-corrosive | AA | 4130 | AlloyNitrided | Alloy Nitrided | 304 or 316SS |
General Service Slightly Corrosive | BB | 4130 | 410SS Nitrided | 17-4PHSS | 304 or 316SS |
General Service Moderately Corrosive | CC | 410SS | 410SS Nitrided | 17-4PHSS | 304 or 316SS |
Sour Service Non-corrosive | DD | 4130 | Alloy Nitrided | Alloy Nitrided | 304 or 316SS |
Sour Service Slightly Corrosive | EE | 4130 | 410SS Nitrided | 17-4PHSS | 304 or 316SS |
Sour Service Highly Corrosive | EE-1 | 4130 | 410SS w/Hardfacing & 410SS Nitrided | Inconel 718 | 304 or 316SS |
Sour Service Moderately Corrosive | FF | 410 | 410SS Nitrided | 17-4PHSS | 304 or 316SS |
Sour Service Highly Corrosive, | FF-1 | 410 Stainless steel | 410SS w/Hardfacing & 410SS Nitrided | Inconel 718 | 304 or 316SS |
Sour Service Highly Corrosive | HH | Alloy Steel w/625 Claded | Inconel 718/625 w/Hard facing | Inconel 718 | 825 |
Custom trim valves may be ordered for your specific application. When ordering custom trim valves, provide the minimal information to facilitate recommendation of the trim that best suits your needs 1) Temperature Range 2) Corrosive or Abrasive Conditions 3) Pressure Rating 4) Operating Environment |