"Honeywell (Honeywell) Valve" fluorine is the gate valve opening and closing parts, ram direction of motion perpendicular to the direction of the fluid, the valve can only be fully open and fully closed, can not be adjusted and the section flow. There are two gate sealing surface, the most common mode of gate valve sealing surface to form two wedge, wedge angle with the valve parameters vary, usually 50, the medium temperature is not high when 2 ° 52 '. Wedge gate valve can be made into a whole, called rigid gate; also be made to produce small deformation gate in order to improve its process, make up the sealing surface angle deviations arising during processing, which gate is called the flexible gate. Valve types, according to the sealing surface configuration can be divided into wedge gate-type valve and parallel gate gate valve, wedge gate-type valve can be divided into: single-gate type, gate-type double plate and elastic; parallel gate-type valve can be divided into single-gate type and double plate. Position by the valve stem threads are divided into clear shot valve and the dark bar gate two. Valve closed, the sealing surface can only rely on media pressure to seal, in which the medium pressure to ram pressure to the other side of the sealing surface of the seat to ensure the sealing surface of the seal, which is self-sealing. Most of the valve is sealed by force, that the valve is closed, to rely on external pressure to force the gate to the seat in order to ensure the sealing surface of the seal. Gate valve with the valve stem with a straight line, called the lift rod valve (also called clear shot valve.) Often movements are trapezoidal threaded rod, nuts through the valve and the valve on the top of the guide slot, the rotary motion into linear motion, that is, the operation of torque, thrust into action. Open the valve, when the gate valve lift height is equal to 1:1 times the diameter, the fluid in the channel completely, but at run time, this position is not monitored. Actual use, based on the apex of stem as a sign that the fixed position, as its fully open position. Temperature changes appear to consider locking phenomenon, usually open to the vertex position, and then rewind 1/2-1 circle, as a fully open valve position. Therefore, the valve fully open position, according to damper position (ie, travel "to determine. Some valve, the stem nut is located at the gate, hand-driven rotation of valve stem rotation, leaving the gate to upgrade, this types of valve is called the rotating rod valve or valve called the dark bar. manual valve works: turn the hand wheel, hand wheel and the valve stem through the thread forward, rewind, increase or decrease the valve plate connected with the stem, to The role of open and close valve has the following advantages: small fluid resistance, the sealing surface by the media, distressed brush and erosion. open and close more effort. media flows unrestricted, no spoiler, do not reduce the pressure. A simple shape, structure, length short, good manufacturing processes for a wide range. valve defects are as follows: between the sealing surface can lead to erosion and abrasion, maintenance more difficult. Overall large size, open requires a certain amount of space, opening and closing a long time. Structure more complicated. type of gate width, according to the sealing surface configuration can be divided into wedge gate-type valve and parallel gate gate valve, wedge gate-type valve can be divided into: single-gate type, double plate, and flexible gate plate; parallel gate type valve can be divided into single-gate type and double plate. by valve stem threads are divided into clear and dark bar gate valve two stroke. Valve installation and maintenance should note the following Notes: hand wheel, handle and drive mechanism for lifting are not allowed to use, and forbid the collision. Gate Valve should be mounted vertically (ie stem in a vertical position, the hand wheel at the top.) gate with a bypass valve open the bypass valve in the valve opening should be preceded (in order to balance imports and exports and reduce the pressure opening force). belt drive mechanism of the valve, according to product instructions for the installation of. If the valve is often switches to use, at least a month lubrication time. structural features: a long time the general market, using the gate the phenomenon of widespread leaks or rust, the introduction of the European high-tech enterprise manufacturing rubber and produced by the valve resilient seated gate valves, gate valves to overcome the general seal bad, rust and other defects, elastic resilient seated gate valve produced by elastic deformation of the compensation effect of trace to achieve a good sealing effect, the valve has a switch to compact, reliable sealing, excellent elastic memory and life and other significant advantages. can be widely used in tap water, sewage, construction, petroleum, chemical, food, pharmaceutical, textile, electric power, shipbuilding, metallurgy, energy systems, as a regulating body of the pipeline and the closure device. valve features: light weight: body using advanced Black cast iron ball, lighter in weight than conventional valve about 20% to 30%, installation and maintenance. flat-type brake blocks: the traditional valve often pass after washing due to foreign objects such as pipe stone, wood, cement, , iron filings, debris and other sediment on the valve end of the groove, can not be closed easily lead to the formation of tight water leakage at the bottom of resilient seated gate valve and pipe machines using the same flat design, easy to siltation caused by debris, the fluid flow unimpeded. On the whole plastic bag: the gate with an overall high-quality rubber, the outsourced plastic, Europe's leading technology allows vulcanization of rubber vulcanization after the gate to ensure the accurate geometry, and rubber and ductile solid gate and then, not easy Good memory loss and flexibility. Water Casting Body: body using precision casting, precision geometry makes the body without any finishing to ensure that the internal valve seal. Valve has the following advantages: 1, fluid resistance the sealing surface by the media, distressed brush and erosion. 2, open and close more effort. 3, medium flow without restriction, no spoiler, do not reduce the pressure. 4, simple shape, structure, length short, good manufacturing processes for a wide range. valve defects are as follows: 1, between the sealing surface can lead to erosion and abrasion, maintenance more difficult. 2, size large, open requires a certain amount of space, opening and closing a long time. 3, more complex structure . type of gate width, according to the sealing surface configuration can be divided into wedge gate-type valve and parallel gate gate valve, wedge gate-type valve can be divided into: single-gate type, gate-type double plate and elastic; parallel gate-type valve can be divided into single-gate type and double plate. by valve stem threads are divided into clear and dark bar gate valve two stroke. Valve installation and maintenance should note the following: 1, hand wheels, handle and drive mechanism for lifting are not allowed to use, and forbid the collision. 2, Gate Valve should be mounted vertically (ie stem in a vertical position, the hand wheel at the top). 3, with the next valve the valve opens the bypass valve opening should be preceded (in order to balance imports and exports and reduce the pressure opening force). 4, belt drive mechanism of the valve, according to product instructions for the installation of. 5, if the valve Doors often switch to use lubrication at least once a month. valve main criteria (1) GB12232-89 "Link Universal iron gate valve flange" (2) GB12234-89 "flange and butt weld valves steel gate "(3) GB8486-87" thread connecting valve, as valve, ball valve, check valve common technical regulations "(4) GB8465.1-87" thread connecting valve, as valves, ball valve, check valve basic size iron gate "(5) JB/T53162-94" gate valve product quality grading "(6) JB/T5298-91" Pipeline steel plate gate "(7) JB / Z243-85 "gate valve static life test procedures" (8) JB/TQ648-88 "flat iron wafer type valve" (9) JB/T53200-94 "flat iron gate on the price of the product quality grading" (10) JB/T53242-94 "steel plate gate valve product quality grading"