SKP Series SKP25 & SKP25-WCVB-01 EX dII T6

지멘스(SIEMENS) SKP25 구동기와 방폭 SKP25-WCVB-01 EX dII T6

SKP25 구동기와 방폭 SKP25 WCVB 01 EX dII T6.

 

자동제어기기 연소기기 전문판매<신화T.M>

제품 문의 및 상담: 010-2976-0665

SKP25…U.. Pressure Regulating Gas Valve Actuator with Safety Shut-off

SKP25

Description

SKP25… pressure regulating electro-hydraulic actuators are used in combination with VG… series gas valve bodies to provide safety shut-off and gas pressure regulation for industrial and commercial burners. The SKP25… can also be applied as a 1:1 air/gas proportionator or zero governor.

Since a single valve performs two or more functions, fewer gas train components and fittings are required. This significantly reduces both the size and weight of the gas train. In addition, smaller diameter gas valves can be used.

The compact SKP25… actuator opens slowly and closes immediately when power is interrupted. The modular design allows the SKP25… to be used in combination with all VG… series gas valve bodies from 1/2-inch to 6-inch in size. The actuator is easily mounted on the square flange of any VG… valve with four pre-mounted screws. A visible position indicator on the front of the actuator displays the entire stroke of the valve. A light indicates when the actuator is powered.

 

Operation

-Safety Shut-off Function

The electro-hydraulic actuator consists of a cylinder filled with oil, a piston containing an electric oscillating pump, and a relief system. When power is supplied to the actuator, the relief system closes, and the pump moves oil from the reservoir into the pressure chamber. This action causes the piston to move downward in the cylinder, opening the gas valve. When power to the actuator is interrupted, the relief system opens and the gas valve closes in less than 0.8 seconds.

A position indicator, visible through the transparent portion of the terminal cover, shows the entire stroke range of the actuator. A light, which is visible through the lower left transparent portion of the terminal cover, indicates when the actuator receives power.

An optional, non-adjustable SPDT proof of closure over travel switch signals the closed position after the gas valve has closed. An optional SPDT auxiliary switch is adjustable between 40% and 100% of the stroke. The adjustment screw and scale are located on the right side in the terminal box, and are visible through the transparent portion of the terminal cover.

SKP25

-Regulating Function

The outlet gas pressure sensing line is connected to the pressure regulator housing. The outlet pressure acts on the regulator diaphragm.

The diaphragm is opposed by an adjustable setpoint spring force, which represents the desired gas pressure value. The movement of the diaphragm modulates a hydraulic bypass valve connecting the pressure chamber to the hydraulic fluid reservoir.

When the outlet gas pressure is lower than the desired value, the bypass valve is closed by the movement of the diaphragm, causing the actuator piston to open the gas valve.

The opposite occurs when the outlet gas pressure is higher than the desired value; the diaphragm moves to open the bypass causing the actuator piston to close the gas valve.

The movement of the actuator piston stops once the outlet gas pressure is equal to the setpoint. In this position the bypass valve is partially open so that the oil flow supplied by the pump is identical to the return flow.

Unlike the conventional direct acting regulators, the SKP25… servo operated regulating system displays virtually zero droop (offset) across the turndown range.

SKP25-WCVB-01

자동제어기기 연소기기 전문판매<신화T.M>

제품 문의 및 상담: 010-2976-0665

방폭형 SKP25(WCVB-01) 구동기 입니다.

Dimensions

 

#SKP25, #SKP25WCVB01, #SKP25-WCVB-01,  #지멘스방폭구동기