Design Standard: API 600/E101
Pressure-temperature Ratings: ASME B16.34
Size Range: 2” to 48”
Pressure Range: Class 150 to 2500
End Connections: Flanged RF, RTJ, Butt Weld
Flanged End Dimensions: ASME B16.5 (≤24”), ASME B16.47 Series A or B (>24”)
Butt Weld End Dimensions: ASME B16.25 Face to Face
Face to Face Dimensions: ASME B16.10
Inspection and Testing: API 598
Body Materials: WCB, CF8, CF3, CF3M, CF8M, A995 4A, 5A, 6A, C95800, INCONEL 625, INCONEL 825, MONEL, WC6, WC9.
Trim Materials: 1#, 5#,8#,10#,12#,16#
Packing materials: graphite, graphite with inconel wire

BODY & BONNET
The design of the body and bonnet is calculated to achieve the most regular distribution of stress in all directions, as well as the
minimum turbulence and resistance to flow. Valve bonnets are equipped with a backseat bushing. The yoke is integrally cast on
Pressure Classes 150 and 300 up to 12″ and up to 10″ on Class 600 and higher ratings.

GATE
All gates are fully guided to the seats. As standard our valves are supplied with a solid flexible gate that has a tapered H cross-
section. The flexible wedge is cast or machined with a circumferential groove to allow the seating surfaces to move independently
and adjust to movement of the body seats. This design is beneficial where line loads or thermal expansion of the system is likely
to distort the seat face in the valve. This design of gate is ideally suited for steam or other high temperature services and is
especially useful to prevent sticking where valves are closed when hot and opened when cold.

SEAT RING
Seat rings are designed to greatly reduce and/or prevent any turbulence and avoid damages due to the corrosion. The seat rings
are forged or rolled in one piece, and then seal welded and overlaid, if required. After welding and all required heat treating, the
seat ring faces are machined, thoroughly cleaned and inspected before leaving for assembly.

STEM
The stem connection to the gate is a T-head design which is integral (without welding) with the stem. The accuracy in the
dimensions and finishes assure a long life with a perfect tightness in the packing area, resulting in lower fugitive emissions. The
stem-to-gate connection is designed to
prevent the turning or the disengagement of stem from the wedge while the valve is in service. Through calculations and extreme
testing, the strength of the stem-to-gate connection has proven to exceed the strength of the stem at the root of its operating
thread.

Product Overview
The American standard high-temperature and high-pressure welded gate valve is an imported type that follows the ANSIB16.34 and USL1E101 standards. The middle part adopts a pressure self tightening type without a valve cover, which has good sealing performance under high temperature and pressure conditions. There are two materials for self sealing rings, one is low-carbon steel, and the other is flexible graphite 316 wire (mesh). The upper layer of the sealing surface is welded with drill based hard alloy, and the processed pure metal layer is ≥ 3mm, which has advantages such as wear resistance, high temperature resistance, corrosion resistance, scratch resistance, and long service life. The two ends of the branch pipe are welded structures, and the welding groove can be made according to standards or user requirements. The valve is suitable for pipes of water, steam, oil products and Superheated steam with high temperature and pressure in thermal power plants, petrochemical industry, metallurgy, etc.

Product Features
1. The shell adopts two process options: forging and casting, with a smooth appearance and uniform organization, meeting the requirements of high temperature and high pressure; We can provide a full series of forged steel gate valves according to user needs; 2. Special material pairing ensures high hardness and poor hardness of the sealing surface; Precision grinding, mirror like finish, wear-resistant and corrosion-resistant, effectively extending service life;
3. The back sealing design effectively protects the sealing filler and prevents leakage and leakage;
4. Multiple tests such as high-pressure water strength, high-pressure gas strength, non-destructive testing, etc., comprehensively controlling the quality of pressure bearing parts;
5. The surface of the valve stem has undergone precision grinding and hardening treatment, which is resistant to scratches and corrosion, effectively reducing the opening and closing torque, and making operation easier;
6. Adopting a special corrosion-resistant packing structure design, it is temperature and pressure resistant, non corrosive, self lubricating, reducing opening and closing friction, avoiding corrosion on the surface of the valve stem, and thus avoiding external leakage; 7. The bi-directional pressure sealing design meets the strict requirements of various special working conditions.

High temperature and high pressure power station gate valves “, also known as power station specialized valves, are mainly suitable for cutting or connecting pipeline media on various systems in thermal power plants. Applicable media: Non corrosive media such as water and steam. The characteristics of power station valves compared to other valve products are high temperature and pressure, unique self sealing design, and the higher the pressure, the more reliable the sealing. Due to the unique performance technology characteristics and working conditions, the product has also formed characteristics that cannot be replaced by other products. This type of valve should generally be installed horizontally in pipelines