American standard gate valve Z41H product overview:

American standard gate valves and flange gate valves belong to the same type of valve, with the difference being that their closing element is a sphere that rotates around the centerline of the valve body to achieve opening and closing. Gate valves are mainly used in pipelines for cutting off and are widely used as a new type of valve. This type of valve should generally be installed horizontally in pipelines.

Characteristics and advantages of American standard gate valves

The pressure bearing parts of the valve are cast using precision casting technology, and the surface quality handwheel is made of malleable cast iron. The shape matches the handle and the friction force is appropriately increased,

Easy to open. And it shows obvious“open”、“close”Logo.

The valve stem nut is made of high nickel ductile iron,“T”The thread and valve stem cooperate to transmit torque.

There is an oil cup on the valve cover, which can be regularly replenished with solid lubricating oil to maintain easy opening and closing.

The packing gland and pressure sleeve are designed separately to ensure the concentricity of the valve stem. Reasonable packing box design ensures that the valve has no leakage and meets environmental requirements.

The valve cover is equipped with an upper sealing ring, which complies with the American Petroleum InstituteAPIStandard.

The connecting bolts of the middle flange of the valve are double headed bolts, which are convenient for maintenance and disassembly.

The valve stem head is forged as a whole and passes through the valve disc“T”Groove connection ensures strength.

DN250The following castings are precision castings, and each batch of castings has a furnace number identification for easy tracking.

Easy torque transmission structure of American standard gate valve

The handwheel transmits torque to the valve stem through the valve stem nut, and the valve stem adoptsA182F6(1Cr13)Forging and tempering treatment, hardnessHB220～250.

In order to reduce the loss of force during transmission, the valve stem nut

Choose high nickel ductile ironA439GR.D2Or copper alloy(High nickel nodular iron has a certain degree of self-lubricating properties)The hardness is smaller than that of the valve stemHB50about.
Large caliber and high-pressure valves can be equipped with thrust bearings on the valve stem nut and bottom, as well as an oil cup structure that can be regularly filled with solid grease to maintain lubrication,

Make the valve have a relatively light torque.

Reasonable design of anti leakage packing box for American standard gate valve

The valve packing is a combination of flexible graphite and braided graphite, which has good sealing performance and certain strength. The packing gland and packing sleeve are designed separately,

Spherical combination can automatically maintain concentricity,

Ensure that the valve stem is not scratched when moving up and down. The packing sleeve is equipped with steps to prevent it from getting stuck in the packing box. The threaded tail of the valve stem is always above the packing to prevent movement

Bring out the filling material. This packing box ensures that the valve is not

The outer building meets environmental protection requirements.

Reliable connection between valve stem head and gate of American standard gate valve

Gate valve stem adoptsA182F6(1Cr13)Forged as a whole, it has strong tensile strength, ensuring that the valve stem head will not break due to faults and cause the gate to sink

Cannot be removed from the valve body.
The valve stem head is equipped with an upper sealing surface that seals with the valve cover sealing pair. When the medium used is special, it is required that the valve has no leakage when fully opened.
The connection between the valve stem head and the gate plate adopts“T”The groove structure allows for a certain degree of freedom between the two, enabling the gate to smoothly slide into the valve seat along the valve body guide rib.

American standard gate valves have a certain wear allowance for replaceable valve seats

The connection between the valve seat and the valve body of the gate valve adopts a threaded connection, which is convenient for maintenance and replacement. The static sealing surface of the valve seat is precisely ground and screwed into the valve body with a special tool,

Realize reliable sealing.
The sealing surface of the gate is wider than the sealing surface of the valve seat by a certain margin, and it is ensured that the bottom line of the gate sealing surface and the bottom line of the valve seat sealing surface are at the same height before the valve is used,

Ensure that the valve will not wear out even after a certain period of use

Reduce the width of the sealing surface that must be ensured.

Design and Manufacturing Standards for American Standard Gate Valves:

Design and Manufacturing:API600　API6D　GB12234
lawLan size:ANSIB 16.5　JB/T79　GB9113
Pressure and temperature:ANSSIB 16.34
Structural length:ANSIB16.10　GB12221
Welding connection size:ANSIB 16.25
Inspection and Testing:API598　JB/T9092

Installation dimensions of American standard gate valve:

ANSI 150Lb
NPS	2	21/2	3	4	6	8	10	12	14	16	18	20	24
L	178	190	203	229	267	292	330	356	381	406	432	457	508
H	400	490	510	585	775	955	1160	1375	1570	1765	1980	-	-
D0	200	200	250	300	350	350	400	450	500	600	700	-	-
Wt	23	45	50	63	108	171	263	346	488	621	814	-	-

ANSI 300Lb
NPS	2	21/2	3	4	6	8	10	12	14	16	18	20	24
L	216	241	283	305	403	419	457	502	762	838	914	991	1143
H	470	525	535	635	805	1025	1230	1460	1645	1840	-	-	-
D0	200	200	300	300	350	400	450	500	600	600	-	-	-
Wt	30	44	61	77	153	286	412	576	886	1175	-	-	-

ANSI 600Lb									ANSI 900Lb
NPS	2	21/2	3	4	6	8	10	12	2	21/2	3	4	6	8
L/L1	292	330	356	432	559	660	787	838	368	419	381	457	610	737
L2	295	333	359	435	562	664	791	841	371	422	384	460	613	740
H	474	530	547	703	913	1077	1276	1499	620	705	695	825	1065	1318
D0	250	250	300	350	450	500	600	680	300	350	350	400	500	600
Wt	37	54	70	110	220	400	600	780	59	79	115	198	303	407
Wt1	32	47	64	103	218	374	570	830	53	71	103	178	271	366

Structural diagram of American standard gate valve Z41H:

Ordering process:
1. Fax the customer's purchase list, call for consultation, or email shweierdun@163.com
2. Received the customer's purchase list and provided the customer with valve model selection and quotation (price list)
3. Specific agreement: delivery time, special requirements, and other matters

Ordering Notice:
1. If the customer has special requirements for the product, the following instructions must be provided in the order contract:
a. Structural length;
b. Connection form;
c. Nominal diameter;
d. Product usage medium, temperature, and pressure range;
e. Testing, inspection standards, and other requirements.
2. Our factory can configure various driving devices according to specific customer requirements.
3. When the customer provides the determined valve type and model, the customer should correctly explain the meaning and requirements of the model, and sign the contract under the condition of mutual understanding between the supply and demand parties.
4. Futures and ordering customers are requested to first call and provide detailed information on the required valve model, specifications, quantity, delivery time, and location. And 30% of the total contract amount shall be prepaid, and the supplier shall prepare materials for production.